840480domain: NAppears in sequencesIrreducible Euler sums of weight 8 and depth 10+2n.at n=27A031164Number of permutations in S_n avoiding {bar 4}2153 (i.e., every occurrence of 2153 is contained in an occurrence of a 42153).at n=10A137536Integers k such that 11 + 210*k*i is prime for i = 0..7.at n=32A235393