39919

Appears in sequences

• Number of 2's in n-th term of A022470.at n=41A022473
• Composite numbers whose prime factors contain no digits other than 1 and 9.at n=26A036309
• Number of partitions of 2n in which odd parts and multiples of 3 and 5 occur with even multiplicities. There is no restriction on the other even parts.at n=30A102346
• 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), (-1, 1, 0), (1, 0, 0), (1, 0, 1), (1, 1, -1)}.at n=8A150450
• Wiener index of a benzenoid consisting of a double-step zig-zag chain of n hexagons (n >= 2, s = 2123; see the Gutman et al. reference).at n=17A193395
• Number of non-isomorphic multiset partitions of weight n with no singletons or vertices that appear only once.at n=13A320665