221135

Appears in sequences

• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (0, 0, 1), (0, 1, -1), (0, 1, 0), (1, 0, -1)}.at n=10A150051
• Nonprime terms in A210494.at n=31A230214
• Triangle read by rows: T(n,k) is the number of unlabeled simple graphs on n vertices with domination number k.at n=37A263284
• Expansion of Sum_{p prime, i>=1} p^i*x^(p^i)/(1 - x^(p^i)) / Product_{j>=1} (1 - x^j).at n=32A281906
• Number of simple graphs on n unlabeled nodes with domination number 2.at n=8A332625