111162domain: NAppears in sequencesNumbers whose sum of digits s equals its product of digits and s + 1 and s - 1 are both prime.at n=10A061597Number of (n+2)X(3+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010101.at n=11A260836