A175102 1, followed by list of numbers n such that the number of strong primes and the number of weak primes are equal at the n-th prime.

1, 60, 64, 41192, 41194, 41247, 41250, 41252, 41257, 41259, 41261, 41263, 41265, 41267, 41273, 41275, 41277, 41279, 41287, 41317, 41319, 41321, 41323, 41325, 41327, 41328, 41329, 41335, 41336, 41338, 41339, 41341, 41389, 41393, 41397, 41399, 41401, 41404, 41406, 41408, 41412, 41444, 41448, 42112

Offset: 1

Author

G. L. Honaker, Jr., Dec 02 2010

Keywords

• nonn

Comments

Also, indices of zeros in A092243. - N. J. A. Sloane, Mar 13 2016

Links

• N. J. A. Sloane and Chai Wah Wu, Table of n, a(n) for n = 1..20000, terms for n = 1..446 from N. J. A. Sloane.
• Chris Caldwell and G. L. Honaker, Jr., Prime Curio for 281

Crossrefs

Cf. A051634, A051635, A092243.

Programs

PARI

my(c=1, q=3, r=2, s=0); print1(c, ", "); forprime(p=5, default(primelimit), c++;(s+=sign(r+0-2*(r=q)+q=p))||print1(c, ", ")) \\ M. F. Hasler, Dec 03 2010

Extensions

More terms from Chris K. Caldwell