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A152430
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Irregular triangle read by rows, giving actual sums arising in A166709.
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1
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2, 2, 3, 5, 2, 3, 5, 8, 10, 2, 3, 5, 7, 8, 10, 12, 15, 17, 2, 3, 5, 7, 8, 10, 11, 12, 15, 17, 18, 23, 26, 28, 2, 3, 5, 7, 8, 10, 11, 12, 13, 15, 17, 18, 23, 24, 26, 28, 31, 36, 39, 41
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| Triangle begins:
n=1: 2
n=2: 2,3,5
n=3: 2,3,5,8,10
n=4: 2,3,5,7,8,10,12,15,17
n=5: 2,3,5,7,8,10,11,12,15,17,18,23,26,28
n=6: 2,3,5,7,8,10,11,12,13,15,17,18,23,24,26,28,31,36,39,41
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CROSSREFS
| Sequence in context: A130725 A138117 A175908 * A117918 A185688 A203955
Adjacent sequences: A152427 A152428 A152429 * A152431 A152432 A152433
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KEYWORD
| nonn,tabf,more
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Oct 24 2009, following a suggestion from Rick Shepherd, Oct 18 2009
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