470155077domain: NAppears in sequencesBinomial coefficients C(n,80).at n=6A017744Binomial coefficients C(86,n).at n=6A017802Triangle, read by rows, where T(n,k) = C( C(n+2,3) - C(k+2,3) + 3, n-k) for n>=k>=0.at n=29A126457Column 1 of triangle A126457; a(n) = C( C(n+3,3) + 2, n).at n=6A126459