60150domain: NAppears in sequences[ exp(2/5)*n! ].at n=7A030972Number of seven-prime Carmichael numbers less than 10^n.at n=16A174615Numbers n for which A222085(n)=A222085(n+1).at n=40A222088Number of ways to write 2*n as an ordered sum of n nonzero triangular numbers.at n=16A338465