id:A070922 - OEIS Search Results

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First palindromic prime pyramids with a(1)=2 such that (number of digits in a(n+1)) = (number of digits in a(n)) + 2.

+0
4

2, 929, 39293, 7392937, 373929373 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`There are only 2 palindromic prime pyramids beginning with 2 (each one is finite with 5 elements).`
	REFERENCES	`G. L. Honaker Jr. and C. Caldwell, Palindromic prime pyramids, J. Recreational Mathematics, vol. 30.3, pp. 169-176, 1999-2000.` `J.-P. Delahaye, "Pour la science", (French edition of Scientific American), Juin 2002, p. 99.`
	CROSSREFS	`Cf. A070927.` `Sequence in context: A050247 A070967 A070927 this_sequence A079233 A024033 A004897` `Adjacent sequences: A070919 A070920 A070921 this_sequence A070923 A070924 A070925`
	KEYWORD	`easy,fini,full,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), May 24 2002`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.