451

( a 2 + b 2 + c 2 + d 2 ) = ( a 2 + b 2 + c 2 ) + ( d 2 )

512

( a 2 + b 2 + c 2 + d 2 ) = ( b 2 + c 2 + d 2 ) + ( a 2 )

124

( a 2 + b 2 + c 2 ) = ( b 2 + c 2 ) + ( a 2 )

245

( b 2 + c 2 + d 2 ) = ( b 2 + c 2 ) + ( d 2 )