40891

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 51 ones.at n=2A031819
• 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), (1, 0, -1), (1, 0, 1), (1, 1, -1)}.at n=9A149360
• Start with a single pentagon; at n-th generation add a pentagon at each expandable vertex (this is the "vertex to side" version); a(n) is the sum of all label values at n-th generation. (See comment for construction rules.)at n=12A247904
• a(n) is the smallest composite squarefree number k such that (p+n) | (k-1) for every prime p dividing k.at n=37A274445
• Number of length n strings on the alphabet {0,1,2,3} with digit sum at most 4.at n=29A363256