155956domain: NAppears in sequencesNumber of primes p in the range 9 < p <= prime(10^n) that have most significant and least significant decimal digit both equal to 7.at n=6A145711Number of nX5 0..1 arrays with every element unequal to 0, 1, 2 or 3 king-move adjacent elements, with upper left element zero.at n=16A303724