26645

Appears in sequences

• Powers of fourth root of 23 rounded to nearest integer.at n=13A018112
• Powers of fourth root of 23 rounded up.at n=13A018113
• Positive numbers y such that y^2 is of the form x^2+(x+233)^2 with integer x.at n=9A157297
• Number of starting positions of Kayles with n pieces such that the 2nd player can win (P-positions).at n=50A263453
• Smallest b such that the k consecutive primes starting with prime(n) are all base-b Wieferich primes, i.e., satisfy b^(p-1) == 1 (mod p^2). Square array A(n, k), read by antidiagonals downwards.at n=52A286816
• A(n, k) is the k-th number b > 1 such that b^(prime(n+i)-1) == 1 (mod prime(n+i)^2) for each i = 0..2, with k running over the positive integers; square array, read by antidiagonals, downwards.at n=35A319060
• Odd numbers k, not powers of primes, such that sigma(k) == 2 modulo 8 and sigma(sigma(k)) == 6 modulo 8.at n=5A332458
• a(n) is the smallest b > 1 such that prime(n), prime(n+1) and prime(n+2) are all base-b Wieferich primes.at n=7A344827
• Number of integer partitions of n where some part is the difference of two consecutive parts.at n=39A364467
• Numbers k such that sigma(k) = psi(k) + tau(k).at n=36A387953