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A277730
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Irregular triangle read by rows: T(n,k) = number of times a gap of 2k occurs between the first n successive odd primes.
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2
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1, 2, 2, 1, 3, 1, 3, 2, 4, 2, 4, 3, 4, 3, 1, 5, 3, 1, 5, 3, 2, 5, 4, 2, 6, 4, 2, 6, 5, 2, 6, 5, 3, 6, 5, 4, 7, 5, 4, 7, 5, 5, 7, 6, 5, 8, 6, 5, 8, 6, 6, 8, 7, 6, 8, 7, 7, 8, 7, 7, 1, 8, 8, 7, 1, 9, 8, 7, 1, 9, 9, 7, 1, 10, 9, 7, 1, 10, 10, 7, 1, 10, 10, 7, 1, 0, 0, 1, 10, 11, 7, 1, 0, 0, 1
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OFFSET
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2,2
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LINKS
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EXAMPLE
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Triangle begins:
1,
2,
2, 1,
3, 1, <- gaps in 3,5,7,11,13 are 2 (3 times), 4 (once)
3, 2,
4, 2,
4, 3,
4, 3, 1,
5, 3, 1,
5, 3, 2,
5, 4, 2,
6, 4, 2,
6, 5, 2,
6, 5, 3,
6, 5, 4,
7, 5, 4,
7, 5, 5,
7, 6, 5,
8, 6, 5,
...
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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