k	$β = 5$	$β = 10$	$β = 15$	$β = 20$	$β = 25$
Case when $\exp (- r^{2})$ is approximated by $f_{G}^{{10}} (r)$
5	−341.0688830474	−341.8636075467	−340.8935079470	−337.7200338828	−332.6977761321
10	−341.9254654373	−341.8947739087	−341.8401496755	−341.3676566108	−340.0652087765
15	−341.8928052396	−341.8951776246	−341.8917224454	−341.8259470423	−341.5155999493
20	−341.8951970225	−341.8951825921	−341.8949449890	−341.8860095241	−341.8175694378
25	−341.8952944608	−341.8951827299	−341.8951646890	−341.8939194761	−341.8792560172
30	−341.8951181845	−341.8951827316	−341.8951812560	−341.8950010631	−341.8918685491
35	−341.8952105375	−341.8951827313	−341.8951826045	−341.8951553894	−341.8944775320
Case when $\exp (- r^{2})$ is approximated by $f_{G e}^{{10}} (r)$
5	−341.0689984810	−341.8637041219	−340.8935705098	−337.7201165391	−332.6978692095
10	−341.9255403121	−341.8948643889	−341.8402253974	−341.3677264589	−340.0652821435
15	−341.8929255824	−341.8952752998	−341.8918113752	−341.8260257799	−341.5156731941
20	−341.8952882673	−341.8952810695	−341.8950408791	−341.8860978972	−341.8176499726
25	−341.8953944688	−341.8952812636	−341.8952626420	−341.8940138238	−341.8793440006
30	−341.8952166476	−341.8952812693	−341.8952796780	−341.8950981092	−341.8919617049
35	−341.8953091217	−341.8952812693	−341.8952811207	−341.8952534430	−341.8945735888
Case when $\exp (- r^{2})$ is approximated by $f_{G e (*)}^{{10}} (r)$
5	−341.0689060243	−341.8636125367	−340.8935075511	−337.7200331523	−332.6977757218
10	−341.9255057473	−341.8947928633	−341.8401553565	−341.3676575772	−340.0652085751
15	−341.8928270961	−341.8952098472	−341.8917464673	−341.8259602261	−341.5156066083
20	−341.8952339038	−341.8952140810	−341.8949735723	−341.8860302791	−341.8175820206
25	−341.8953255387	−341.8952146307	−341.8951961273	−341.8939474244	−341.8792775015
30	−341.8951481135	−341.8952145413	−341.8952129050	−341.8950312970	−341.8918948319
35	−341.8952455669	−341.8952145712	−341.8952144367	−341.8951867772	−341.8945069443