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Search: id:A105100
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| A105100 |
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Sum of ordered 3 prime sided prime triangles. |
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+0
2
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| 41, 156, 304, 462, 630, 834, 1020, 1214, 1420, 1618, 1824, 2076, 2288, 2514, 2712, 2926, 3198, 3460, 3656, 3874, 4086, 4370, 4598, 4888, 5100, 5346, 5626, 5886, 6126, 6332, 6580, 6836, 7146, 7386, 7678, 7848, 8208, 8560, 8762, 8962, 9258, 9498, 9696
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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An ordered 3 prime sided prime triangle is 6 consecutive primes arranged in an equilateral triangle of the form
...........p(6n-5)
.....p(6n-4).....p(6n-3)
.p(6n-2)...p(6n-1)......p(6n)
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EXAMPLE
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The first 3 prime sided prime triangle
2
3 5
7 11 13
adds up to 41, the first entry.
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PROGRAM
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(PARI) sumtri3x3(n) = { local(x, j, s); forstep(x=1, n, 6, s = prime(x)+prime(x+1)+prime(x+2)+prime(x+3)+prime(x+4)+prime(x+5); print1(s", ") ) }
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CROSSREFS
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Sequence in context: A108016 A142630 A082252 this_sequence A141988 A158602 A142839
Adjacent sequences: A105097 A105098 A105099 this_sequence A105101 A105102 A105103
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KEYWORD
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easy,nonn
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AUTHOR
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Cino Hilliard (hillcino368(AT)gmail.com), Apr 07 2005
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