507376domain: NAppears in sequencesNumbers k such that prime(k-1) + 7 is square and equal to prime(k+1) - 1.at n=8A158470a(n)=(n^4-n^3-n^2-n)/2.at n=32A171129Number of 0..n arrays x(0..5) of 6 elements with each no smaller than the sum of its three previous neighbors modulo (n+1).at n=13A200670