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A156116 Five-digit mountain-type primes that increase to and decrease from the central digit, including palindromes. 2
12421, 12541, 12641, 12653, 12721, 12743, 12763, 12821, 12841, 12853, 12941, 12953, 12973, 12983, 13421, 13721, 13751, 13763, 13831, 13841, 13873, 13921, 13931, 13963, 14543, 14621, 14653, 14731, 14741, 14753, 14821, 14831, 14843, 14851, 14951, 14983 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Sequence is finite, ending with a(185) = 78941.

LINKS

Nathaniel Johnston, Table of n, a(n) for n = 1..185 (full sequence)

MAPLE

for a from 1 to 9 do for b from a+1 to 9 do for c from b+1 to 9 do for d from 2 to c-1 do for e from 1 to d-1 do n:=10000*a+1000*b+100*c+10*d+e: if(isprime(n))then printf("%d, ", n): fi: od:od:od:od:od: # Nathaniel Johnston, Jun 23 2011

CROSSREFS

Sequence in context: A248084 A224120 A233964 * A068676 A252613 A221016

Adjacent sequences: A156113 A156114 A156115 * A156117 A156118 A156119

KEYWORD

nonn,base,easy,fini,full

AUTHOR

Ki Punches, Feb 14 2009

EXTENSIONS

Minor edits by Ray Chandler, Feb 20 2009

STATUS

approved

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Last modified December 6 09:41 EST 2022. Contains 358610 sequences. (Running on oeis4.)