84197domain: NAppears in sequencesn-th 6k+1 prime times n-th 6k-1 prime.at n=29A048629Numbers with distinct digits appearing in partition of decimal expansion of Pi.at n=10A104819Number of (n+2) X 3 binary arrays with every 3 X 3 subblock commuting with each horizontal and vertical neighbor 3 X 3 subblock.at n=20A190025