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A110746 a(n+1) is the least multiple of a(n) such that the digit reversal of the concatenation of the first n+1 terms is prime. 1
1, 1, 2, 4, 8, 136, 272, 1360, 14960, 254320, 6103680, 30518400, 335702400, 8056857600, 499525171200, 63439696742400, 1649432115302400, 94017630572236800, 5923110726050918400, 1528162567321136947200, 385096966964926510694400, 93963659939442068609433600 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..22.

EXAMPLE

11, 211, 4211, 84211, 63184211 are all primes.

CROSSREFS

Cf. A110747.

Sequence in context: A286523 A060815 A200758 * A084010 A203630 A265595

Adjacent sequences:  A110743 A110744 A110745 * A110747 A110748 A110749

KEYWORD

base,nonn,less

AUTHOR

Amarnath Murthy, Aug 10 2005

EXTENSIONS

Clarified definition and extended. - David Wasserman, Dec 16 2008

STATUS

approved

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Last modified October 26 06:08 EDT 2021. Contains 348257 sequences. (Running on oeis4.)