41475

Appears in sequences

• Numbers k such that 9*10^k - 1 is prime.at n=11A056725
• a(n) = K_3(n) = Sum_{k>=0} A090285(3,k)*2^k*binomial(n,k). a(n) = (4*n^3+30*n^2+56*n+15)/3.at n=29A090294
• 5th-largest term in the n-th row of Stern's diatomic triangle A002487.at n=19A244475
• Number of length n+3 0..2 arrays with every four consecutive terms having the maximum of some two terms equal to the minimum of the remaining two terms.at n=12A249701
• Number of unlabeled semi-binary rooted trees with n nodes in which the non-leaf branches directly under any given node are all equal.at n=22A320271
• Number of integer partitions of n such that the dual of the multiset partition obtained by factoring each part into prime numbers is a weak antichain.at n=43A326978