18115

Appears in sequences

• a(n) = Sum_{0<=j<=i<=n} A027170(i, j).at n=10A027180
• Numbers k such that k and k^2 use only the digits 1, 2, 3, 5 and 8.at n=25A136976
• 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, 0), (0, 0, -1), (0, 0, 1), (0, 1, 1), (1, 0, 1)}.at n=7A151164
• Expansion of 1 / ((1-x)^2*(1-x^2)*(1-x^3)*...*(1-x^9)).at n=30A288344