26053

Properties

Appears in sequences

• Numbers k such that rotating digits of k^2 left once still yields a square.at n=19A045878
• First term of strong prime sextets: p(m+1)-p(m) > p(m+2)-p(m+1) > p(m+3)-p(m+2) > p(m+4)-p(m+3) > p(m+5)-p(m+4).at n=7A054813
• Primes p for which the period of reciprocal 1/p is (p-1)/12.at n=33A056217
• Primes p such that q-p = 30, where q is the next prime after p.at n=30A124596
• Sum of n and partition number of n.at n=38A133041
• Number of obtuse triangles, distinct up to congruence, on an n X n grid (or geoboard).at n=21A190022
• Primes of the form 7n^2 + 6.at n=9A201607
• Numbers a(n) for which there exists k>1 such that the number of partitions of a(n) into k parts is k.at n=37A209122
• Primes of the form n^2 + phi(n).at n=25A264771
• Primes p = x^2 + y^2 such that x - y is a cube greater than one.at n=35A282405
• Primes p that set a new record for the size of the smallest b > 1 such that b^(p-1) == 1 (mod p^2).at n=31A287147
• Number of aperiodic rooted trees with n nodes.at n=14A301700
• Sum of the prime parts in the partitions of n into 6 parts.at n=39A309467
• a(n) = Sum_{k=0..floor(n/2)} 2^(n-2*k) * binomial(2*k+1,2*n-4*k).at n=16A387649
• Prime numbersat n=2866