179040

Appears in sequences

• Numbers k such that sigma(k^2+1) is a perfect square.at n=28A067465
• 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), (-1, 1, 0), (0, 0, 1), (1, 0, -1)}.at n=13A148076
• First differences of harmonic (or Ore) numbers A001599.at n=25A153789
• Number of n-digit binary strings such that for all 2 <= k <= n, the string formed by the first k digits of the original string is composed of at least one-quarter 1's and one-quarter 0's.at n=19A268691