209601

Appears in sequences

• Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 22 (most significant digit on right).at n=37A061951
• Row sums of triangle A141155.at n=25A141156
• 1000-gonal numbers: a(n) = n*(499*n - 498).at n=21A195163
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n)^2, where a(0) = 1, a(1) = 3, b(0) = 2, b(1) = 4, b(2) = 5, and (a(n)) and (b(n)) are increasing complementary sequences.at n=18A296246