43750000domain: NAppears in sequencesTriangle whose (i,j)-th entry is binomial(i,j)*5^(i-j)*10^j.at n=32A038252Triangle whose (i,j)-th entry is binomial(i,j)*10^(i-j)*5^j.at n=31A038307Expansion of g.f. (1 + 7*x)/(1 - 50*x^2).at n=9A096882Triangle T(n, k) = binomial(n, k)*A000166(n-k)*k^n with T(0, 0) = 1, read by rows.at n=41A156788