Recurrence a(n) = a(n-2) + n^M for M=6, starting with a(0)=0, a(1)=1.

Terms

a(0) =0a(1) =1a(2) =64a(3) =730a(4) =4160a(5) =16355a(6) =50816a(7) =134004a(8) =312960a(9) =665445a(10) =1312960a(11) =2437006a(12) =4298944a(13) =7263815a(14) =11828480a(15) =18654440a(16) =28605696a(17) =42792009a(18) =62617920a(19) =89837890a(20) =126617920a(21) =175604011a(22) =239997824a(23) =323639900a(24) =431100800a(25) =567780525a(26) =740016576a(27) =955201014a(28) =1221906880