8001504000domain: NAppears in sequencesDenominator of Sum_{k=0..n} 1/binomial(n,k)^3.at n=10A100519For n people on one side of a river, the number of ways they can all travel to the opposite side following the pattern of 2 sent, 1 returns, 2 sent, 1 returns, ..., 2 sent.at n=7A167484