204841

Appears in sequences

• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-2)*b(n-1), where a(0) = 2, a(1) = 4, b(0) = 1, b(1) = 3, and (a(n)) and (b(n)) are increasing complementary sequences.at n=19A296264
• Number of unlabeled multigraphs with loops allowed and n edges covering three vertices.at n=39A327728