71370

Appears in sequences

• Numbers k such that (1/k) * Sum_{d|k} d*sigma(d) is an integer.at n=18A069520
• Triangle read by rows: T(n,k) is the number of even trees with 2n edges and jump-length equal to k (0<=k<=n-1).at n=41A127535
• Sum of squares of cycle lengths for different cycles in Fibonacci-like sequences modulo n.at n=29A233246
• Subsequence of lesser of 2 terms of A095301 that are 2 apart.at n=23A248083
• Irregular triangle read by rows: for n >= 2, 2 <= k <= floor(n/2) + 1, T(n,k) = the number of semi-meanders with n top arches, a first arch of length one and k arch groupings.at n=58A339179