94445domain: NAppears in sequencesNumbers, p, that generate the prime quadruplets p^2-2p+2k (for k = -2, -1, 1, 2).at n=13A247882Number of (n+2) X (1+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00000000 or 00000001.at n=13A259635a(n) = n * Sum_{d|n} binomial(d+n-1,n)/d.at n=9A343549