132358domain: NAppears in sequences{2^n}_{2^n}.at n=7A122623a(n) = {n^2}_{n^2}.at n=15A122626Expansion of b(2)*b(4)*b(6)/(1-x-x^2-x^4+x^6+x^8), where b(k) = (1-x^k)/(1-x).at n=19A266355