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

Terms

a(0) =1a(1) =5a(2) =6a(3) =22a(4) =23a(5) =59a(6) =60a(7) =124a(8) =125a(9) =225a(10) =226a(11) =370a(12) =371a(13) =567a(14) =568a(15) =824a(16) =825a(17) =1149a(18) =1150a(19) =1550a(20) =1551a(21) =2035a(22) =2036a(23) =2612a(24) =2613a(25) =3289a(26) =3290a(27) =4074a(28) =4075a(29) =4975