12104136domain: NAppears in sequencesa(n) = binomial(n+6,6)*(2n+7)/7.at n=28A050486Eighth column of (1,5)-Pascal triangle A096940.at n=28A096945Expansion of Sum_{1<=i<=j<=k<=l} q^(i+j+k+l)/( (1-q^i)*(1-q^j)*(1-q^k)*(1-q^l) )^2.at n=28A374931