61403

Properties

Appears in sequences

• Primes that are not the sum of 3 hexagonal numbers.at n=73A117089
• Numbers k such that (20^k - 1)/19 is prime.at n=6A127995
• a(1) = 1, a(2) = 7, for n >= 3, a(n) = smallest prime > a(n-1) such that a(n) mod a(n-1) = a(n-2).at n=5A175208
• Least prime divisor of the n-th central Delannoy number D(n) which does not divide any D(k) with k < n, or 1 if such a primitive prime divisor of D(n) does not exist.at n=23A242173
• Least prime p such that 3 + 4*prime(p*n) = 5*prime(q*n) for some prime q.at n=33A260886
• Numerators of coefficients in expansion of (sin(x))/(1 - x - x^2).at n=7A279332
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 910", based on the 5-celled von Neumann neighborhood.at n=15A284402
• Prime numbersat n=6177