46702656000domain: NAppears in sequencesDenominator of Laguerre(n, 1).at n=15A160622a(n) = (n+1)*(n-1)!/2.at n=11A171005Number of permutations of 1..n with no element e[i>=2]<e[1+floor((i-2)/6)] (6-way heap).at n=16A178011