-14975domain: ZAppears in sequencesA symmetrical triangle sequence: T(n, k) = q^k + q^(n-k) - q^n, with q=5.at n=23A176226A symmetrical triangle sequence: T(n, k) = q^k + q^(n-k) - q^n, with q=5.at n=25A176226Expansion of Product_{k>=1} (1 + x^(3*k))^(3*k) / (1 + x^k)^k.at n=37A285294