52927domain: NAppears in sequencesa(1)=1, a(n) = a(n-1) + n^4 if n odd, a(n) = a(n-1) + n^1 if n is even.at n=13A140158Number of nondecreasing integer sequences of length 23 with sum zero and sum of absolute values 2n.at n=15A158157G.f.: x * Product_{j>=1, k>=1} (1 + a(j)*x^(j*k)).at n=13A308154