708665domain: NAppears in sequencesExpansion of series related to Liouville's Last Theorem: g.f. sum_{t>0} (-1)^(t+1) *x^(t*(t+1)/2) / ( (1-x^t)^6 *product_{i=1..t} (1-x^i) ).at n=26A059823Number of nondecreasing arrangements of n+2 numbers in 0..6 with each number being the sum mod 7 of two others.at n=22A183909