A050721 - OEIS

A050721

Primes arising in A083571.

2, 3, 11, 109, 173, 5513600773 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	COMMENTS	`Prime indices of palindromic triangular numbers.`
	LINKS	`Table of n, a(n) for n=1..6.` `P. De Geest, Subsets of palindromic triangulars`
	CROSSREFS	`Cf. A008510, A050722.` `Sequence in context: A300898 A079853 A358602 * A058114 A042337 A061482` `Adjacent sequences: A050718 A050719 A050720 * A050722 A050723 A050724`
	KEYWORD	`nonn,base,hard`
	AUTHOR	`Patrick De Geest, Sep 15 1999`
	STATUS	`approved`

Last modified March 28 16:30 EDT 2023. Contains 361596 sequences. (Running on oeis4.)