23467

Appears in sequences

• Numbers k such that 7*2^k + 5 is prime.at n=22A058595
• a(0) = 0, a(1) = a(2) = 1, a(3) = 2, a(4) = 4, for n>3: a(n+1) = SORT[ a(n) + a(n-1) + a(n-2) + a(n-3) + a(n-4)], where SORT places digits in ascending order and deletes 0's.at n=43A108565
• Take an n X n square grid of points in the plane; a(n) = number of non-isomorphic ways to divide the points into two sets using a straight line.at n=27A116696
• a(n) = a(n-1) + a(n-2) + n + 1, a(0) = a(1) = 1.at n=18A210677
• Number of partitions of n into distinct parts with boundary size 7.at n=43A227564
• a(n) = the number of ways that at least two distinct primes <= prime(n) sum to a prime.at n=15A262765
• Expansion of Product_{k>=1} 1/(1 - x^k / (1 - k*x)).at n=10A336990