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A117382
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Primes not expressible as the sum of two triangular numbers.
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0
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5, 17, 19, 23, 41, 47, 53, 59, 71, 89, 103, 107, 109, 113, 131, 149, 167, 173, 179, 197, 223, 229, 233, 239, 251, 257, 269, 271, 283, 293, 311, 313, 317, 337, 347, 349, 359, 383, 397, 401, 419, 431, 439, 449, 457, 467, 479, 491, 503, 509, 521, 523, 547, 557
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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MATHEMATICA
| Complement[ Prime@ Range@115, Union@ Flatten@ Table[i(i + 1)/2 + j(j + 1)/2, {i, 35}, {j, 0, i}]] - Robert G. Wilson v (rgwv(at)rgwv.com), Apr 27 2006
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CROSSREFS
| Cf. A000040, A117112.
Sequence in context: A141558 A040153 A038896 * A191076 A166685 A167915
Adjacent sequences: A117379 A117380 A117381 * A117383 A117384 A117385
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KEYWORD
| easy,nonn
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AUTHOR
| Greg Huber (huber(AT)alum.mit.edu), Apr 24 2006
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EXTENSIONS
| More terms from Robert G. Wilson v (rgwv(at)rgwv.com), Apr 27 2006
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