A395703 Position of the first (2*n-1)-digit palindromic prime occurring in the decimal expansion of Pi, A000796.

1, 26, 489, 13902, 129080, 5793498, 25803984, 298503034, 6604858610, 72075707768

Offset

1,2

Links

Table of n, a(n) for n=1..10.

GitHub, Pi Prime Palindromes Challenge.

Example

First 1-digit palindromic prime is 3 at position 1 within Pi. So a(1) = 1.
First 3-digit palindromic prime is 383 at position 26 within Pi. So a(2) = 26.

Crossrefs

Cf. A000040, A000796, A002385, A104819, A104841, A104842, A198344, A279885, A395673.

Sequence in context: A001723 A163201 A395706 * A205990 A230247 A058461

Adjacent sequences: A395700 A395701 A395702 * A395704 A395705 A395706

Keyword

nonn,base,hard,more

Author

Jean-Marc Rebert, May 04 2026

Status

approved