200240
domain: N
Appears in sequences
- G.f.: 1 = Sum_{n>=0} a(n)*x^n/(1+x)^(4*2^n).at n=5A137158
- Number of permutations of n objects such that no four-element subset is preserved.at n=9A213323
- Number of permutations of n objects such that no five-element subset is preserved.at n=9A213324
- a(n) = Sum_{d|n} Sum_{p|n, p prime} n^gcd(d,p).at n=9A351844