97050domain: NAppears in sequencesNumber of n X n arrays of squares of integers summing to 6 with every element equal to at least one neighbor.at n=5A146197Number of maximal 2-independent sets in the planar 3 X n grid graph.at n=17A231882Let p = n-th prime == 7 mod 8; a(n) = sum of quadratic residues mod p.at n=29A282041