67678

Appears in sequences

• 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, 0, 1), (-1, 1, 1), (1, -1, 1), (1, 0, -1), (1, 0, 1)}.at n=9A149407
• Number of ordered 10-tuples of distinct pairwise coprime positive integers with largest element n.at n=20A186981
• Number of 9-element subsets of {1, 2, ..., n} having pairwise coprime elements.at n=23A186985
• a(n) = n*(7*n^2 + 15*n + 8)/6.at n=38A245301
• The successive approximations up to 7^n for 7-adic integer 4^(1/5).at n=6A309452