a(1)=1, a(n) = a(n-1) + n^4 if n odd, a(n) = a(n-1) + n^1 if n is even.

Terms

a(0) =1a(1) =3a(2) =84a(3) =88a(4) =713a(5) =719a(6) =3120a(7) =3128a(8) =9689a(9) =9699a(10) =24340a(11) =24352a(12) =52913a(13) =52927a(14) =103552a(15) =103568a(16) =187089a(17) =187107a(18) =317428a(19) =317448a(20) =511929a(21) =511951a(22) =791792a(23) =791816a(24) =1182441a(25) =1182467a(26) =1713908a(27) =1713936a(28) =2421217a(29) =2421247