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A065245
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2 + Sum_{k = 1..n} k^2 is a prime.
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2
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1, 2, 13, 17, 18, 21, 22, 25, 26, 34, 45, 49, 57, 70, 74, 85, 89, 90, 94, 101, 129, 134, 146, 165, 166, 174, 189, 209, 234, 241, 250, 277, 301, 326, 333, 342, 358, 369, 377, 381, 382, 386, 390, 413, 426, 441, 458, 470, 477, 486, 489, 490, 493, 522, 525, 529
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Values of m in A065244.
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LINKS
| Harry J. Smith, Table of n, a(n) for n=1,...,1000
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PROG
| (PARI) { n=s=0; for (m = 1, 10^9, s+=m^2; if (isprime(2 + s), write("b065245.txt", n++, " ", m); if (n==1000, return)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Oct 14 2009]
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CROSSREFS
| Cf. A000330, A065244.
Sequence in context: A042253 A041645 A032453 * A158845 A163786 A153507
Adjacent sequences: A065242 A065243 A065244 * A065246 A065247 A065248
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KEYWORD
| nonn
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AUTHOR
| Labos E. (labos(AT)ana.sote.hu), Oct 24 2001
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