131684

Appears in sequences

• Row sums of triangle A131948.at n=17A131949
• 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), (-1, 1, -1), (0, 1, -1), (1, -1, -1), (1, 0, 1)}.at n=11A148653
• Triangle T(n,k) in which n-th row lists in increasing order the values of the n-th derivative at x=1 of all functions that are representable as x^x^...^x with n x's and parentheses inserted in all possible ways; n>=1, 1<=k<=A000081(n).at n=40A216350
• Expansion of Product_{k>=2} (1 + k*x^k).at n=28A317913
• Number of subsets of Z_n such that every ordered pair of distinct elements has a different difference.at n=37A382399