126139

Appears in sequences

• Number of multigraphs with loops on 3 nodes with n edges.at n=36A050531
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-1) + n, where a(0) = 1, a(1) = 3, b(0) = 2, b(1) = 4.at n=20A294365