31524

Appears in sequences

• Numbers k such that sopfr(k) = sopf(k+1), where sopf(k) = A008472(k) and sopfr(k) = A001414(k).at n=22A064675
• a(n) = 100*n^2 - 49*n + 6.at n=17A157651
• Values of the difference d for 6 primes in geometric-arithmetic progression with the minimal sequence {7*7^j + j*d}, j = 0 to 5.at n=13A209205
• Fixed points of the function A260529(n) = concatenation of the positions of digits 9, 8,..., 0 in the decimal representation of n, using 1 for the rightmost digit etc., skipping digits which don't occur.at n=25A260275
• Numbers n which divide A260521(n), the concatenation of the positions of the digits 9, 8, ..., 0 in the decimal representation of n, where positions are counted from the right, and 0 if a given digit does not occur.at n=48A260386
• List of André permutations of the second kind.at n=15A278983
• Decimal encoding T(n,k) of the k-th non-averaging permutation of [n]; triangle T(n,k), n >= 0, k = 1..A003407(n), read by rows.at n=26A292523
• Decimal representation of permutations of lengths 1, 2, 3, ...at n=33A306428
• Derangements of {1,2,...,n} (n >= 2) in lexicographic order.at n=25A320588
• Number of polygon edges formed by infinite lines when connecting all vertices and all points that divide the sides of an equilateral triangle into n equal parts.at n=8A344896
• a(n) = number of subsets S of {1,2,...,n} having more than 1 element such that (sum of least two elements of S) < max(S).at n=15A357283