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Search: id:A102416
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| A102416 |
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Triangle read by rows: the numbers B_2(n,k) from the Harju and Nowotka paper. |
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+0
4
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| 2, 2, 4, 2, 16, 4, 28, 6, 4, 56, 14, 8, 108, 30, 16, 6, 216, 60, 28, 12, 424, 124, 60, 24, 12, 848, 248, 128, 48, 24, 1684, 492, 244, 90, 48, 20, 3368, 984, 512, 186, 96, 40, 6712, 1960, 1000, 384, 192, 80, 40, 13424, 3920, 2032, 756, 372, 160, 80, 26808
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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It took a while to get these numbers and I cannot find the paper now, so do not have a more precise description. - N. J. A. Sloane (njas(AT)research.att.com).
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REFERENCES
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T. Harju and D. Nowotka, Counting bordered and primitive words with a fixed weight, Preprint, Oct 28, 2004
T. Harju and D. Nowotka, Counting bordered and primitive words with a fixed weight, Theoret. Comput. Sci. 340 (2005), no. 2, 273-279.
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EXAMPLE
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Triangle begins:
2
2
4, 2
16, 4
28, 6, 4
56, 14, 8
108, 30, 16, 6
216, 60, 28, 12
424, 124, 60, 24, 12
848, 248, 128, 48, 24
1684, 492, 244, 90, 48, 20
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CROSSREFS
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Cf. A102864, A103179.
Sequence in context: A059427 A126984 A159749 this_sequence A129243 A084896 A011388
Adjacent sequences: A102413 A102414 A102415 this_sequence A102417 A102418 A102419
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KEYWORD
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nonn,tabf
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Mar 17 2005
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