1262601

Appears in sequences

• a(n) = number of decimal digits in the n-th odd Catalan number A038003(n).at n=21A260677
• Solution of the complementary equation a(n) = a(0)*b(n-1) + a(1)*b(n-2) + ... + a(n-1)*b(0) + 1, where a(0) = 1, a(1) = 3, b(0) = 2, and (a(n)) and (b(n)) are increasing complementary sequences.at n=11A296221