The On-Line Encyclopedia of Integer Sequences (OEIS)

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A163759

Exactly three distinct primes occur as substrings of the digits of n.
(history; published version)

#2 by Russ Cox at Sat Mar 31 10:29:57 EDT 2012

AUTHOR

_Gil Broussard (gilbroussard(AT)bellsouth.net), _, Aug 03 2009

Discussion

Sat Mar 31

10:29

OEIS Server: https://oeis.org/edit/global/620

#1 by N. J. A. Sloane at Tue Jun 01 03:00:00 EDT 2010

NAME

Exactly three distinct primes occur as substrings of the digits of n.

DATA

23, 37, 53, 73, 117, 123, 127, 132, 135, 139, 153, 157, 167, 171, 172, 175, 193, 211, 213, 217, 227, 229, 230, 232, 234, 236, 238, 241, 243, 247, 251, 259, 263, 267, 275, 277, 279, 295, 307, 312, 315, 319, 323, 325, 327, 329, 331, 352, 357, 370, 374, 376

OFFSET

1,1

EXAMPLE

a(1) = 23 because "2" and "3" and "23" are prime substrings of "23".

KEYWORD

base,easy,nonn

AUTHOR

Gil Broussard (gilbroussard(AT)bellsouth.net), Aug 03 2009

STATUS

approved