510720

Appears in sequences

• Triangle T(k,n) by rows: n! * A075499(k,n).at n=33A099394
• Number of partial bijections (or subpermutations) of an n-element set with exactly 1 fixed point.at n=8A144086
• T(n,k) is the number of partial bijections (or subpermutations) of an n-element set with exactly k fixed points.at n=37A144088
• Sums of 2 distinct primorials.at n=24A177689
• Numbers n such that there are three distinct triples (k, k+n, k+2n) of squares.at n=16A222154
• Integers k such that numerator and denominator of sigma(k)/k are both prime.at n=23A247086
• Numbers k such that k = Sum_{i=1..j} (d_i mod d), where d_i are their aliquot parts and d is one of them.at n=31A265646
• Values of Euler's totient phi for A050498.at n=10A339883
• Numbers k such that A051378(k) > 2*k and A333926(k) <= 2*k.at n=6A349284
• Let S(n)=sigma(n)/3. Numbers k such that S^m(k)=k, 1/3-sociable numbers (of any order).at n=18A356548
• Numbers k in A276156 (sums of distinct primorial numbers) where the maximal exponent in the prime factorization of k attains a novel value.at n=7A369649
• Triangle read by rows: T(n,k) = A002110(n) + A002110(k), 0 <= k <= n; sums of two primorials, not necessarily distinct.at n=32A370121
• Triangle read by rows: T(n,k) = A002110(n) + A002110(k), 1 <= k <= n; sums of two primorials > 1, not necessarily distinct.at n=24A370134
• Numbers k such that k is a multiple of A327860(k), where A327860 is the arithmetic derivative of the primorial base exp-function.at n=17A380527
• Numbers k such that A276086(k) = A391936(k).at n=12A391937