110476domain: NAppears in sequencesa(n) = floor( n*(n-1)*(n-2)*(n-3)/22 ).at n=41A011932Indices of records in A286720.at n=11A287395Indices of records in A287434.at n=18A287708Number of series/singleton-reduced rooted trees on strongly normal multisets of size n.at n=7A330471