23087

Properties

Appears in sequences

• Primes such that the sum of the factorials of the digits is a perfect square.at n=40A052279
• Least prime in A031930 (lesser of 12-twins) whose distance to the next 12-twin is 2*n.at n=16A052355
• Number of subdiagonal directed diagonally-convex animals with given diagonal semiperimeter.at n=9A053022
• 6 consecutive primes differ by 2n or more starting at a(n).at n=5A054689
• n consecutive primes differ by 12 or more starting at a(n).at n=4A054696
• Positions at which powers of 2 occur in A057929. (Or -1 if it does not occur.)at n=22A057931
• Numbers k such that (3^k + 11^k)/14 is prime.at n=4A128070
• 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), (0, -1, 1), (0, 1, 0), (1, 1, -1)}.at n=10A148206
• 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, 0), (-1, 0, -1), (-1, 0, 1), (0, 1, -1), (1, 0, 1)}.at n=9A149176
• 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), (0, 0, 1), (0, 1, 0), (1, -1, 0)}.at n=9A149878
• a(n) = a(n-1) # n, where # is addition, subtraction, multiplication if prime(n) == respectively 0, 1, 2 (mod 3).at n=13A154382
• Primes p such that floor(log(p)) + p^2 is prime.at n=23A225626
• Number of partitions p of n such that the number of numbers having multiplicity 1 in p is a part and the number of numbers having multiplicity > 1 is a part.at n=42A241414
• Numbers k such that both 3*k-2 and 2*k-3 are in A338410.at n=6A338416
• Primes p which can be written as p = (A060735(k) +- next largest prime factor not in A060735(k)) for some k.at n=40A378018
• Prime numbersat n=2579