The On-Line Encyclopedia of Integer Sequences (OEIS)

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A088088

a(1) = 1, a(n) = smallest multiple of a(n-1) such that every partial concatenation (n >1) is a prime.
(history; published version)

#6 by N. J. A. Sloane at Thu Dec 05 19:56:33 EST 2013

AUTHOR

_Amarnath Murthy (amarnath_murthy(AT)yahoo.com), _, Sep 23 2003

Discussion

Thu Dec 05

19:56

OEIS Server: https://oeis.org/edit/global/2075

#5 by Russ Cox at Sat Mar 31 13:20:50 EDT 2012

EXTENSIONS

More terms from _David Wasserman (wasserma(AT)spawar.navy.mil), _, Jul 14 2005

Discussion

Sat Mar 31

13:20

OEIS Server: https://oeis.org/edit/global/880

#4 by N. J. A. Sloane at Fri Feb 27 03:00:00 EST 2009

EXAMPLE

11,113,11321, etc. are primes.

KEYWORD

base,nonn,new

#3 by N. J. A. Sloane at Wed Dec 06 03:00:00 EST 2006

EXAMPLE

11,113,11321,etc. are primeprimes.

KEYWORD

base,nonn,new

#2 by N. J. A. Sloane at Tue Jul 19 03:00:00 EDT 2005

DATA

1, 1, 3, 21, 147, 1029, 103929, 311787, 311787, 311787, 4053231, 28372617, 1447003467, 44857107477, 134571322431, 39967682762007, 5155831076298903, 3542055949417346361, 456925217474837680569, 216125627865598222909137

KEYWORD

base,more,nonn,new

EXTENSIONS

More terms from David Wasserman (wasserma(AT)spawar.navy.mil), Jul 14 2005

#1 by N. J. A. Sloane at Thu Feb 19 03:00:00 EST 2004

NAME

a(1) = 1, a(n) = smallest multiple of a(n-1) such that every partial concatenation (n >1) is a prime.

DATA

1, 1, 3, 21, 147, 1029

OFFSET

0,3

EXAMPLE

11,113,11321,etc. are prime.

CROSSREFS

Cf. A088089.

KEYWORD

base,more,nonn

AUTHOR

Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 23 2003

STATUS

approved