27509

Properties

Appears in sequences

• Primes that remain prime through 4 iterations of function f(x) = 6x + 5.at n=24A023317
• Numerators of continued fraction convergents to sqrt(489).at n=8A041932
• Denominators of continued fraction convergents to sqrt(911).at n=7A042761
• Number of asymmetric (identity) trees with n nodes and 7 leaves.at n=8A055338
• a(n) = Sum_{i=0..n} 2^i*B(i)*binomial(n,i) where B(n) = Bell numbers A000110(n).at n=6A126390
• a(n) = 52*n^2 + 1.at n=23A158644
• Seventh prime p such that (p+n)^2+n is prime but (p+j)^2+j is not prime for all 0<j<n.at n=20A238679
• Least prime of the form x^2+13*n^2.at n=45A248409
• Primes p = x^2 + y^2 such that x - y is a cube greater than one.at n=37A282405
• Number of alternating strict compositions of n. Number of alternating (up/down or down/up) permutations of strict integer partitions of n.at n=35A349054
• Number of pairs (y, v) of integer partitions of n where the length of v equals the number of distinct parts in y.at n=20A355385
• Prime numbersat n=3005