26838

Appears in sequences

• Numbers k such that 57*2^k + 1 is prime.at n=28A002274
• "BGK" (reversible, element, unlabeled) transform of 0,1,1,1,...at n=37A032060
• Numbers n such that 6*10^n + 7*R_n - 4 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=8A103042
• a(n) is the number of dominoes, among all domino tilings of the 2 X n rectangle, sharing a length-2 side with the boundary of the rectangle.at n=16A320947
• Number of ways to write n as an ordered sum of 9 primes (counting 1 as a prime).at n=12A341988
• Number of integer partitions of n with non-integer median of multiplicities.at n=47A360690