1048554domain: NAppears in sequencesa(n) = 2^n - n - 2.at n=18A000247a(n)^2 + 1 is largest prime of the form x^2 + 1 <= 2^n.at n=39A0838482^n minus the sum of the proper divisors of n.at n=19A242389Submain diagonal of array A265903: a(n) = A265903(n+1, n).at n=14A265909Records of A112591.at n=18A375235