108411domain: NAppears in sequencesIndices of primes in the sequence defined by A(0) = 49, A(n) = 10*A(n-1) - 81 for n > 0.at n=13A101715Number of 6 X n 0..1 arrays with antidiagonals unimodal and rows and diagonals nondecreasing.at n=17A224042