cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A104491 Prime numbers n for which the square excess of the n-th prime is prime.

Original entry on oeis.org

2, 5, 13, 19, 23, 37, 67, 71, 83, 107, 109, 113, 139, 157, 173, 199, 271
Offset: 1

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Author

Jonathan Vos Post, Mar 10 2005

Keywords

Examples

			199 is an element of this sequence because 199 is prime and the 199th prime is 1217 and 1217 - 34^2 = 61 and 61 is prime, while 1217 - 35^2 = -8.
		

Crossrefs

Formula

n such that A102821(n) is prime. n such that A053186(A000040(n)) is an element of A000040.