19002

Appears in sequences

• Number of regular graphs with n unlabeled nodes.at n=12A005176
• [ 3rd elementary symmetric function of {sqrt(k+1)} ], k = 1,2,...,n.at n=14A025220
• Numbers k such that 255*2^k+1 is prime.at n=40A032504
• 30*a(n) is the gap between sexy prime triples in the n-th sexy prime triple triple whose initial term is 11.at n=13A090890
• A hexagonal spiral Fibonacci sequence.at n=20A094925
• Number of n X n symmetric 0..6 arrays with no element equal to the sum mod 7 of any two of its horizontal and vertical neighbors.at n=2A193224
• Number of superdiagonal partitions: partitions (p1, p2, p3, ...) of n such that pi >= i.at n=51A238873
• Anagrasum integers: integers N that exactly reproduce their set of digits when we form the set of sums of pairs of adjacent digits.at n=37A296521
• Irregular triangle read by rows: T(n,k) is the number of distinct Wilf classes of subsets of exactly k patterns in S_n, for 0 <= k <= n!.at n=21A346624
• a(n) = Sum_{d|n} (n/d)^n * binomial(d+n,n).at n=4A363662
• Smallest number m > 1 such that some permutation of the digits of m^n is a Fibonacci number.at n=3A371589