23215

Appears in sequences

• Expansion of x/((1-x)(1-4x^2)(1-5x)).at n=6A002041
• Number of 6-ary rooted trees with n nodes and height at most 7.at n=14A036624
• a(n) = a(1) + a(2) + ... + a(n-1) + a(m) for n >= 3, where m = 2^(p+1) + 2 - n and p is the smallest number such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = 1 and a(2) = 2.at n=14A049961
• Integer part of log(n)^(n^(1 - 1/n)).at n=12A062465
• a(n) = floor(9^n/7^n).at n=40A094991
• 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=9A148883
• T(n,k)=Number of (n+1)X(k+1) 0..7 arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors.at n=6A186490
• T(n,k)=Number of (n+1)X(k+1) 0..7 arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors.at n=9A186490
• T(n,m)=Number of (n+1)X5 0..m arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors.at n=21A189174
• Number of ordered triples (w,x,y) with all terms in {-n, ..., -1, 1, ..., n} and 5w + x + y > 0.at n=18A211630
• Number of 6-element subsets of [n] whose sum is a triangular number.at n=21A320852