490149

Appears in sequences

• Number of compositions of n into 9 ordered relatively prime parts.at n=15A023034
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-2)^2, where a(0) = 1, a(1) = 3, b(0) = 2, and (a(n)) and (b(n)) are increasing complementary sequences.at n=21A296258