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A156116
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Five-digit mountain-type primes, that increase to and decrease from the central digit; including palindromes.
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2
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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; internal format)
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OFFSET
| 1,1
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COMMENTS
| Sequence is finite, ending with a(185)=78941.
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LINKS
| Nathaniel Johnston, Table of n, a(n) for n = 1..185 (full sequence)
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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
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CROSSREFS
| Sequence in context: A140938 A202563 A061731 * A068676 A206664 A033669
Adjacent sequences: A156113 A156114 A156115 * A156117 A156118 A156119
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KEYWORD
| nonn,base,easy,fini
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AUTHOR
| Ki Punches (ki(AT)kispy.net), Feb 14 2009
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EXTENSIONS
| Minor edits by Ray Chandler (rayjchandler(AT)sbcglobal.net), Feb 20 2009
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