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Search: id:A154725
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| A154725 |
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Triangle read by rows in which row n lists 2n-1 terms: The pairs of prime numbers that are equidistant to n, with 0's inserted, as shown below in the example. |
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+0
12
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| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 5, 0, 0, 0, 0, 3, 0, 0, 0, 7, 0, 0, 0, 0, 0, 0, 5, 0, 7, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 11, 0, 0, 0, 0, 3, 0, 5, 0, 0, 0, 0, 0, 11, 0, 13, 0, 0, 0, 0, 0, 0, 5, 0, 7, 0, 0, 0, 11, 0, 13, 0, 0, 0, 0
(list; graph; listen)
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OFFSET
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1,12
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EXAMPLE
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Triangle begins:
. . . . . . . . . . . . . . .0
. . . . . . . . . . . . . 0, 0, 0
. . . . . . . . . . . .0, 0, 0, 0, 0
. . . . . . . . . . 0, 0, 3, 0, 5, 0, 0
. . . . . . . . .0, 0, 3, 0, 0, 0, 7, 0, 0
. . . . . . . 0, 0, 0, 0, 5, 0, 7, 0, 0, 0, 0
. . . . . .0, 0, 3, 0, 0, 0, 0, 0, 0, 0,11, 0, 0
. . . . 0, 0, 3, 0, 5, 0, 0, 0, 0, 0,11, 0,13, 0, 0
. . .0, 0, 0, 0, 5, 0, 7, 0, 0, 0,11, 0,13, 0, 0, 0, 0
. 0, 0, 3, 0, 0, 0, 7, 0, 0, 0, 0, 0,13, 0, 0, 0,17, 0, 0
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CROSSREFS
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Cf. A000040, A154720, A154721, A154722, A154723, A154724, A154726, A154727.
Sequence in context: A094665 A052439 A143073 this_sequence A010816 A133089 A136599
Adjacent sequences: A154722 A154723 A154724 this_sequence A154726 A154727 A154728
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KEYWORD
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easy,nonn,tabf
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AUTHOR
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Omar E. Pol (info(AT)polprimos.com), Jan 14 2009
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