Number of composite numbers around 6^n.
1, 5, 11, 5, 29, 13, 21, 17, 31, 11, 93, 53, 51, 17, 97, 65, 83, 17, 35, 17, 29, 137, 79, 95, 29, 141, 35, 79, 51, 25, 77, 63, 125, 137, 93, 135, 161, 275, 109, 161, 205, 93, 77, 323, 185, 127, 117, 55, 101, 389, 77, 89, 17, 61, 93, 107, 219, 99, 335, 617, 29
1
T. D. Noe, Plot of 1000 terms
T. D. Noe, Table of 1000 terms
(Mma) Table[NextPrime[6^n] - NextPrime[6^n, -1] - 1, {n, 50}]
nonn
T. D. Noe, Mar 09 2015