73890domain: NAppears in sequencesNumbers k such that 277*2^k + 1 is prime.at n=30A053355Number of binary strings of length n with equal numbers of 00000 and 01010 substrings.at n=17A164185G.f. satisfies A(x) = 1 + x*A(x)^2 + x^2*A(x)^6.at n=8A364473