38519domain: NAppears in sequencesNumbers k such that 4*10^k - 11 is prime.at n=21A102738Row sums of A181851.at n=13A181849Number of (n+2) X 7 binary arrays with every 3 X 3 subblock commuting with each horizontal and vertical neighbor 3 X 3 subblock.at n=18A190029