26459

Properties

Appears in sequences

• Numbers m such that 3*2^m - 1 is prime.at n=36A002235
• Primes that remain prime through 4 iterations of function f(x) = 9x + 10.at n=15A023327
• a(n) is the smallest k such that (k^3 + 1)/(n^3 + 1) is an integer > 1.at n=43A065964
• Primes p such that primorial(p)/2 + 2 is prime.at n=22A096177
• Numbers n for which 2*R_n + 1 is a prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=20A096506
• Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 00100-00100-00100-11111 pattern in any orientation.at n=12A147319
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, 0, 1), (1, -1, 1), (1, 1, -1), (1, 1, 1)}.at n=8A149650
• a(n) = 60*n^2 - 1.at n=20A158670
• a(n) is the n-th J_19-prime (Josephus_19 prime).at n=10A163799
• Primes p such that 3*2^p-1 is also prime.at n=8A175171
• Primes of the form 2*k^2 + 9.at n=43A201476
• Irregular array T(n,k) of the numbers of non-extendable (complete) non-self-adjacent simple paths starting at each of a minimal subset of nodes within a square lattice bounded by rectangles with nodal dimensions n and 9, n >= 2.at n=32A214042
• Number of (7+2) X (n+2) 0..1 arrays with every 3 X 3 subblock sum of the two sums of the diagonal and antidiagonal minus the two minimums of the central column and central row nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=14A254913
• a(n) = (A259756(n)-1)/8.at n=0A275417
• Number of partitions of prime(n)^2 into squares of primes.at n=10A276557
• Primes p whose last digit is the same as that of both its predecessor prime and its successor prime.at n=24A298075
• Smallest number of complexity n with respect to the operations {1, shift, multiply}.at n=42A319975
• Primes p such that p=prime(k), prime(k+1), and prime(k+2) end in the same digit.at n=25A328452
• Primes p such that p^7 - 1 has 8 divisors.at n=20A341669
• Primes p such that (p-1)/2, (p-2)/3, 2*p+1, 3*p+2 are all prime numbers.at n=2A348307