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Search: id:A107990
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| A107990 |
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Prime area faces of cubes if the integer part of cube's volume is prime. |
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+0
1
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| 2, 3, 5, 43, 89, 113, 131, 163, 457, 467, 509, 541, 587, 739, 773, 887, 1109, 1123, 1201, 1307, 1319, 1409, 1613, 1741, 1747, 1787, 1979, 2063, 2069, 2459, 2467, 2671, 2689, 2741, 2789, 3187, 3203, 3539, 3547, 3557, 3643, 3823, 3917, 3989, 4021, 4441, 4447
(list; graph; listen)
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OFFSET
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2,1
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FORMULA
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V = floor(sqrt(p)^3), p is prime and the area of the face of a cube.
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EXAMPLE
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p = 5, volume = floor(sqrt(5)^3) = 11 a prime.
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PROGRAM
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(PARI) g(n) = forprime(x=2, n, y=floor(sqrt(x)^3); if(isprime(y), print1(x, ", ")))
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CROSSREFS
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Adjacent sequences: A107987 A107988 A107989 this_sequence A107991 A107992 A107993
Sequence in context: A106713 A106820 A042469 this_sequence A117460 A136371 A060380
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KEYWORD
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easy,nonn,uned
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AUTHOR
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Cino Hilliard (hillcino368(AT)gmail.com), Jun 13 2005
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