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A110998
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Numbers n such that (23*n^2) - 9 is prime.
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1
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2, 4, 16, 38, 40, 44, 70, 82, 86, 88, 116, 128, 130, 142, 152, 158, 170, 178, 194, 224, 226, 238, 262, 268, 298, 304, 310, 320, 346, 352, 362, 364, 368, 392, 406, 418, 434, 446, 452, 458, 460, 472, 478, 490, 494
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| If n=88 then (23*n^2) - 9 = 178103 (prime).
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MATHEMATICA
| Select[Range[500], PrimeQ[(23#^2 - 9)] &] - Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Feb 28 2006
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CROSSREFS
| Sequence in context: A074411 A189838 A000216 * A051861 A048222 A192890
Adjacent sequences: A110995 A110996 A110997 * A110999 A111000 A111001
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KEYWORD
| nonn
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AUTHOR
| Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Sep 30 2005
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EXTENSIONS
| More terms from Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Feb 28 2006
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