31725

Appears in sequences

• Numbers k such that sigma(k) = sigma(k+11).at n=16A015881
• Mean divisor of n differs by <= 1 from mean divisor of all numbers from 1 to n-1.at n=25A049010
• Integers that are Rhonda numbers to base 14.at n=4A100972
• Numbers k such that k-4, k-2, k+2 and k+4 are prime.at n=22A173037
• a(n) = (4*n^3-3*n^2+5*n-3)/3.at n=28A177342
• The number of P-positions in the game of Nim with up to five piles, allowing for piles of zero, such that the total number of objects in all piles is 2n.at n=36A238759
• Number of length n permutations avoiding (123,{2},{}) and (123,{},{1}).at n=10A249562
• Numbers m such that there are precisely 17 groups of order m.at n=14A294949
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where column k is the expansion of e.g.f. B(x)^k, where B(x) is the e.g.f. of A384617.at n=60A384808