a(1)=1; for n>1, a(n) = a(n-1) + n^0 if n odd, a(n) = a(n-1) + n^3 if n is even.

Terms

a(0) =1a(1) =9a(2) =10a(3) =74a(4) =75a(5) =291a(6) =292a(7) =804a(8) =805a(9) =1805a(10) =1806a(11) =3534a(12) =3535a(13) =6279a(14) =6280a(15) =10376a(16) =10377a(17) =16209a(18) =16210a(19) =24210a(20) =24211a(21) =34859a(22) =34860a(23) =48684a(24) =48685a(25) =66261a(26) =66262a(27) =88214a(28) =88215a(29) =115215