76665domain: NAppears in sequencesNumbers k such that k and k^2 use only the digits 2, 5, 6, 7 and 8.at n=37A137111Numerator of Bernoulli(n,10).at n=5A158211a(n) = 56*n^2 + 1.at n=37A158660L.g.f.: G(x) = x*exp( Sum_{n>=1} G(G(x)^n)/n ) where G(x) = x*exp(Sum_{n>=1} a(n)*x^n/n).at n=6A179326