1414647domain: NAppears in sequencesNumerators b(n) of Pythagorean approximations b(n)/a(n) to Pi.at n=7A195545Number of nX6 0..1 arrays with every element equal to 0, 1, 2, 4, 5 or 7 king-move adjacent elements, with upper left element zero.at n=7A299095