19422

Appears in sequences

• Number of primitive (aperiodic) palindromes using a maximum of three different symbols.at n=17A056459
• Sum_{k=2..n} min(k,n-k)*phi(k)*(n-k).at n=28A092274
• Numbers k for which 8*k+1, 8*k+5, 8*k+7 and 8*k+11 are primes.at n=29A123983
• 6n-1,6n+1, 6n+5, 6n+7 are all primes. That is they are adjacent pairs of twin primes.at n=40A178145
• Partial sums of cuban primes A002407, that is, primes equal to the difference of two consecutive cubes.at n=17A221793
• Numbers n such that n is the average of four consecutive primes n-5, n-1, n+1 and n+5.at n=33A258088
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 813", based on the 5-celled von Neumann neighborhood.at n=24A273640
• Number of degree n products of distinct cyclotomic polynomials.at n=31A280611
• Numbers k > 0 such that either 3*k+4, k-2, k+2, n+k or 3*k+5, k-1, k+1, k+5 are all primes.at n=44A290130
• a(0) = 1; a(n) = -Sum_{k=1..n} prime(k+1) * a(n-k).at n=19A353156
• Consecutive states of the linear congruential pseudo-random number generator (419*s + 6173) mod 29282 when started at s=1.at n=25A385036