73762domain: NAppears in sequencesDenominators of continued fraction convergents to sqrt(656).at n=16A042261Triangle read by rows: T(n,m) (n >= 1, 1 <= m <= n) = number of set partitions of [n], avoiding 123454, with m blocks.at n=60A250119a(n) is the sum of all positive integers whose Collatz orbit has length n.at n=16A337673