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A086475 a(1) = 1 and then least square-free number such that every partial concatenation of 2 or more terms is a prime. +0
1
1, 3, 7, 11, 13, 29, 37, 113, 123, 229, 287, 319, 443, 481, 533, 541, 557, 771, 777, 991, 1479, 1487, 1663, 2063, 2163, 2193, 2553, 2911, 3251, 3391, 3867, 3873, 3983, 4021, 4047, 4233, 4481, 4777, 4937, 4981, 6123, 6711, 7251 (list; graph; listen)
OFFSET

1,2
EXAMPLE

13,137,13711 etc. are primes.

CROSSREFS

Sequence in context: A111363 A114273 A074336 this_sequence A154832 A164568 A053728

Adjacent sequences: A086472 A086473 A086474 this_sequence A086476 A086477 A086478

KEYWORD

base,nonn

AUTHOR

Jason Earls and Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jul 22 2003

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Last modified December 6 22:55 EST 2009. Contains 170429 sequences.

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