25829

Appears in sequences

• Pseudoprimes to base 7.at n=32A005938
• Strong pseudoprimes to base 38.at n=21A020264
• Strong pseudoprimes to base 49.at n=11A020275
• Numerators of continued fraction convergents to sqrt(271).at n=7A041508
• Expansion of e.g.f. -exp(-x)*log(1-2*x)/2.at n=7A120765
• Semiprimes formed by inserting a semiprime between the semiprime's ordered factors.at n=6A227942
• Numbers decremented by their digit product produce a cube.at n=36A229184
• Odd numbers m that are neither of the form p + 2^k nor of the form p - 2^k with 2^k < m, k >= 1, and p prime.at n=35A255967
• Euler pseudoprimes to base 7: composite integers such that abs(7^((n - 1)/2)) == 1 mod n.at n=22A262054
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 481", based on the 5-celled von Neumann neighborhood.at n=32A272457
• Numbers k such that k!6 + 6 is prime, where k!6 is the sextuple factorial number (A085158 ).at n=24A287956
• Breadth-first reading of the subtree rooted at 5 of the tree where each parent node is the arithmetic derivative (A003415) of all its children.at n=21A327975
• Number of connected components of n faces of the icosidodecahedron up to the 120 rotations and reflections of the icosidodecahedron.at n=25A384107