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Search: id:A108039
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| A108039 |
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Replace each entry 2^i(2j+1) of the triangle in A008280 by i and replace 0's by *'s; then the entries n in the new triangle do not occur beyond diagonal a(n), measured from the left edge and taking the left edge to be diagonal number 1. |
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+0
1
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| 2, 4, 4, 4, 4, 8, 8, 8, 8, 10, 12, 12, 16, 16
(list; graph; listen)
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OFFSET
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0,1
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REFERENCES
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Arnold, V. I., Bernoulli-Euler updown numbers associated with function singularities, their combinatorics and arithmetics, Duke Math. J. 63 (1991), 537-555.
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EXAMPLE
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3's do not occur beyond the 4th diagonal, so a(3) = 4.
Triangle begins:
.....*
....*.0
...0.0.*
..*.0.1.1
.0.0.2.1.*
*.0.1.1.4.4
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CROSSREFS
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Sequence in context: A035645 A063440 A008497 this_sequence A162798 A097154 A108421
Adjacent sequences: A108036 A108037 A108038 this_sequence A108040 A108041 A108042
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KEYWORD
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nonn,more
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Jun 01 2005
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