123720

Appears in sequences

• Expansion of Product_{n>=1} (1 - x^(5*n))/(1 - x^n)^5 in powers of x.at n=12A277212
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-1) + b(n-2) - b(n-3), where a(0) = 1, a(1) = 2, a[2] = 3, b(0) = 4, b(1) = 5, b(2) = 6, and (a(n)) and (b(n)) are increasing complementary sequences.at n=21A295366