66044domain: NAppears in sequencesa(n) = binomial(n+5,4) - 1.at n=32A063258Expansion of Product_{k>=1} (1 + x^(k^2))^2/(1 - x^(k^2))^2.at n=39A279227Numbers k such that k and k+1 have at least 4 but not both exactly 4 distinct prime factors.at n=7A321494