1064876737domain: NAppears in sequencesa(n) = 2*a(n-1) + 7*a(n-2).at n=15A083100a(n) = 2*a(n-1) + 7*a(n-2) for n>1, a(0)=1, a(1)=1.at n=16A084058Prime numbers in A084058.at n=4A111013a(0)=1, a(1)=9, a(n) = 18*a(n-1) - 49*a(n-2) for n > 1.at n=8A165224a(n) = Sum_{k=0..n} n^k * binomial(2*n,2*k).at n=8A333990