60454domain: NAppears in sequencesNumbers n such that binomial(2n, n) - 1 is prime.at n=48A066726Numbers k such that sigma(k+2) = sigma(k+1) + sigma(k).at n=6A104149Number of (n+1) X 6 binary arrays with consecutive windows of two bits considered as a binary number nondecreasing in every row and column.at n=11A202332