26489

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 49.at n=31A020388
• Numbers k such that (5^k + 2^k)/7 is prime.at n=11A082387
• A Chebyshev transform of the Padovan numbers.at n=39A100049
• Primes for which the period of the reciprocal equals (p-1)/14.at n=20A135073
• Numbers of the form prime(prime(prime(k))) with a digit sum which is prime.at n=38A162252
• Partial sums of Sum_{k=1..n} n/gcd(n,k), or partial sums of Sum_{d|n} d*phi(d) (see A057660).at n=46A174405
• Number of permutations of 1..n with the number moved left exceeding the number moved right by 0 or more.at n=8A179566
• Centered 28-gonal numbers.at n=43A195314
• Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 2,6,1,0,1,0,1 for x=0,1,2,3,4,5,6.at n=6A197964
• Partial sums of primes, but with a twist.at n=17A247657
• Primes that can be generated by the concatenation in base 7, in ascending order, of two consecutive integers read in base 10.at n=24A287308
• Numbers k such that [prime(k), prime(k+1), prime(k+2)] = [1, 2, 3] mod 11.at n=37A302767
• The prime numbers that are prime-indexed primes and whose digit sum, adjacent digit sum concatenation, and adjacent digit difference concatenation are also primes.at n=7A331031
• Number of relatively prime compositions of n with no 1's.at n=24A337450
• Consecutive states of the linear congruential pseudo-random number generator (7200*s + 1) mod 23^4 when started at s=1.at n=15A383162
• Prime numbersat n=2909