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

Terms

a(0) =1a(1) =2a(2) =29a(3) =30a(4) =155a(5) =156a(6) =499a(7) =500a(8) =1229a(9) =1230a(10) =2561a(11) =2562a(12) =4759a(13) =4760a(14) =8135a(15) =8136a(16) =13049a(17) =13050a(18) =19909a(19) =19910a(20) =29171a(21) =29172a(22) =41339a(23) =41340a(24) =56965a(25) =56966a(26) =76649a(27) =76650a(28) =101039a(29) =101040