75721

Properties

Appears in sequences

• Primes that remain prime through 4 iterations of function f(x) = 9x + 4.at n=23A023325
• Primes that remain prime through 5 iterations of the function f(x) = 9x + 4.at n=5A023353
• 4th column of number array A083075.at n=20A083079
• Denominators of the convergents of the continued fraction for L(2, chi3), where L(s, chi3) is the Dirichlet L-function for the non-principal character modulo 3.at n=14A153068
• Middle of 3 consecutive prime numbers, p1, p2, p3, such that p1*p2*p3*d1*d2 = average of twin prime pairs; d1 (delta) = p2 - p1, d2 (delta) = p3 - p2.at n=34A153410
• Number of binary strings of length n with equal numbers of 0001 and 0101 substrings.at n=18A164158
• a(n) = 3F0( -n,-n+1,-n+2;;-1)= n!*(n-1)!* 1F2(-n+2;2,3;-1)/2, where nFm(;;z) are generalized hypergeometric series.at n=4A174315
• Primes of the form 7n^2 + 9.at n=16A201609
• (A122536(n)-A003000(n))/2.at n=25A218874
• a(n) = G_n(5), where G_n(k) is the Goodstein function defined in A266201.at n=27A266204
• Primes that are the first in a run of exactly 4 emirps.at n=23A346024
• Prime numbersat n=7461