a(1)=1, a(n)=a(n-1)+n^2 if n odd, a(n)=a(n-1)+ n^0 if n is even.

Terms

a(0) =1a(1) =2a(2) =11a(3) =12a(4) =37a(5) =38a(6) =87a(7) =88a(8) =169a(9) =170a(10) =291a(11) =292a(12) =461a(13) =462a(14) =687a(15) =688a(16) =977a(17) =978a(18) =1339a(19) =1340a(20) =1781a(21) =1782a(22) =2311a(23) =2312a(24) =2937a(25) =2938a(26) =3667a(27) =3668a(28) =4509a(29) =4510