Sum of sixth powers of odd numbers.

Terms

a(0) =1a(1) =730a(2) =16355a(3) =134004a(4) =665445a(5) =2437006a(6) =7263815a(7) =18654440a(8) =42792009a(9) =89837890a(10) =175604011a(11) =323639900a(12) =567780525a(13) =955201014a(14) =1550024335a(15) =2437528016a(16) =3728995985a(17) =5567261610a(18) =8132988019a(19) =11651731780a(20) =16401836021a(21) =22723199070a(22) =31026964695