45946
domain: N
Appears in sequences
- a(n) = floor(tau*a(n-2)) + a(n-1) with a(0)=1 and a(1)=3.at n=17A005907
- Convolution of natural numbers with (1, p(1), p(2), ... ), where p(k) is the k-th prime.at n=42A023538
- The 28-cycle of the n => sigma(n)-n process, where sigma(n) is the sum of divisors of n (A000203).at n=23A072890
- Number of permutations of length n which avoid the patterns 1234, 3142, 3421.at n=14A116767
- Conjectured list of sociable numbers.at n=12A122726
- a(n) = 25*2^(n+3) - (198+392*n/3+36*n^2+10*n^3/3).at n=8A169833
- Numbers k such that the sum of the divisors of k is of the form m^3 + 1.at n=38A289384
- Conjectured list of numbers which are perfect, amicable, or sociable.at n=32A347770
- Numbers k such that k + sopfr(k) is a cube.at n=30A389862