id:A087352 - OEIS Search Results

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a(n+1) is the smallest square > a(n) such that every concatenation (n > 1) is a prime.

+0
2

1, 9, 49, 81, 441, 729, 15129, 33489, 35721, 127449, 184041, 288369, 505521, 594441, 1046529, 4004001, 4941729, 8415801, 14130081, 19474569, 20820969, 21427641, 25070049, 31236921, 33419961, 37197801, 57471561, 58201641, 58844241 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`19, 1949, 194981, 194981441 are all primes.`
	CROSSREFS	`Cf. A087353.` `Adjacent sequences: A087349 A087350 A087351 this_sequence A087353 A087354 A087355` `Sequence in context: A028375 A032598 A110873 this_sequence A039940 A012111 A016838`
	KEYWORD	`base,nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 08 2003`
	EXTENSIONS	`More terms from David Wasserman (wasserma(AT)spawar.navy.mil), May 10 2005`

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Last modified May 16 23:01 EDT 2008. Contains 139884 sequences.

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