A382457 Number of twin self-primes <= 10^n.

2, 2, 2, 2, 12, 87, 534, 3683, 27738, 231431, 2061879

Offset: 1

Author

Shyam Sunder Gupta, Mar 27 2025

Keywords

• nonn
• base
• more

Links

• Shyam Sunder Gupta, On Some Marvellous Numbers of Kaprekar, Exploring the Beauty of Fascinating Numbers, Springer (2025) Ch. 9, 275-315.

Crossrefs

Cf. A003052, A006880, A007508, A380713, A380715, A006378, A382452, A382456.

Extensions

a(11) from Amiram Eldar, Apr 04 2025