1071360

Appears in sequences

• Triangle read by rows, T(n, k) = 4^k*S_4(n, k) where S_m(n, k) are the Stirling-Frobenius subset numbers of order m; n >= 0, k >= 0.at n=24A225467
• a(n) is the smallest number m with exactly n such divisors d that sigma(d) divides m.at n=40A309253