Recurrence a(n) = a(n-2) + n^M for M=4, starting with a(0)=0, a(1)=1.

Terms

a(0) =0a(1) =1a(2) =16a(3) =82a(4) =272a(5) =707a(6) =1568a(7) =3108a(8) =5664a(9) =9669a(10) =15664a(11) =24310a(12) =36400a(13) =52871a(14) =74816a(15) =103496a(16) =140352a(17) =187017a(18) =245328a(19) =317338a(20) =405328a(21) =511819a(22) =639584a(23) =791660a(24) =971360a(25) =1182285a(26) =1428336a(27) =1713726a(28) =2042992a(29) =2421007