56341

Appears in sequences

• Product of twin-prime-indexed primes and their upper bound twin prime.at n=8A080699
• Brilliant numbers (A078972) whose digit reversal is a triangular number.at n=5A115677
• Triangle read by rows: T(n,k) is the number of weighted lattice paths B(n) having k HH's. B(n) is the set of lattice paths of weight n that start in (0,0), end on the horizontal axis and never go below this axis, whose steps are of the following four kinds: a (1,0)-step h of weight 1; a (1,0)-step H of weight 2; a (1,1)-step u of weight 2; a (1,-1)-step d of weight 1. The weight of a path is the sum of the weights of its steps.at n=51A246183
• Number of 1 up, 1 down, 2 up, 1 down, 3 up, 1 down, ... permutations of [n].at n=11A247550