21075

Appears in sequences

• a(n) = round(n*phi^14), where phi is the golden ratio, A001622.at n=25A004949
• a(n) = ceiling(n*phi^14), where phi is the golden ratio, A001622.at n=25A004969
• "DIK" (bracelet, indistinct, unlabeled) transform of 5,5,5,5...at n=6A032286
• Number of ternary rooted trees with n nodes and height exactly 6.at n=16A036421
• Numbers n such that n divides the (left) concatenation of all numbers <= n written in base 13 (most significant digit on right).at n=10A061966
• a(n) = n * (n+1)^2 * (3*n^2 + 4*n + 2) / 12.at n=9A132122
• 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, 0, 0), (0, -1, 1), (1, 0, -1), (1, 1, 1)}.at n=8A149699
• Number of partitions p of n such that (number of numbers in p of form 3k+2) < (number of numbers in p of form 3k).at n=44A241740
• a(n) is the denominator of the resistance R(n) = A338401(n)/a(n) of a triangular network of 3*n*(n+1)/2 one Ohm resistors in a hexagonal lattice arrangement.at n=5A338402
• Number of partitions of an n-set without blocks of size 7.at n=9A343667