A366910 Number of n-bit binary reversible primes.
0, 1, 2, 2, 4, 6, 9, 14, 27, 36, 69, 94, 178, 308, 589, 908, 1540, 2814, 5158, 9210, 16732, 29392, 55109, 101120, 179654, 332130, 625928, 1136814, 2120399, 3963166, 7377931, 13878622, 25958590, 48421044, 92163237, 173672988, 325098134, 617741968, 1177573074, 2221353224, 4222570054
Offset: 1
Examples
The 5-bit binary reversible primes are 17="10001", 23="10111", 29="11101" and 31="11111", so a(5)=4.
Links
- Cathy Swaenepoel, Table of n, a(n) for n = 1..50
- Cécile Dartyge, Bruno Martin, Joël Rivat, Igor E. Shparlinski, and Cathy Swaenepoel, Reversible primes, arXiv:2309.11380 [math.NT], 2023. See p. 34.
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