2298240

Appears in sequences

• Numbers n such that prime(n) +- n, prime(n) +- 2n and prime(n) +- 3n are all primes.at n=4A113567
• a(1)=1. a(n+1) = n!/lcm(a(1),a(2),...,a(n)).at n=19A131120
• a(n) = (32/2)*(n-1)*(n-2)*(n-3)*(n-4).at n=21A134175
• a(n) is the number of partial bijections (or subpermutations) of an n-element set with exactly 2 fixed points.at n=9A144087
• T(n,k) is the number of partial bijections (or subpermutations) of an n-element set with exactly k fixed points.at n=47A144088
• Number of pairs of consecutive non-fixed points in all permutations of {1,2,...,n}.at n=7A162968
• (n-1)-st elementary symmetric function of the first n terms of (1,2,3,4,5,1,2,3,4,5,...)=A010884.at n=13A203166
• Number of elements of S_n with strategic pile of size 4.at n=10A267324
• a(n) = n!*A063019(n).at n=8A292751
• Number of (7-n)-faces of the 1_42 polytope.at n=3A321638
• Sum of the orders of all permutations of [n] with distinct cycle lengths.at n=9A382780