31787domain: NAppears in sequencesTriangle of coefficients of polynomials v(n,x) jointly generated with A209170; see the Formula section.at n=49A209171Number of ordered triples (w,x,y) with all terms in {-n,...,-1,1,...,n} and w+3x+3y>0.at n=20A211625Number of ways to write n as an ordered sum of 7 primes.at n=34A340963