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A102416
Triangle read by rows: the numbers B_2(n,k) from the Harju and Nowotka paper.
3
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
OFFSET
0,1
COMMENTS
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.
LINKS
T. Harju and D. Nowotka, Counting bordered and primitive words with a fixed weight, TUCS Technical Report, No 630, Turku, November 2004.
T. Harju and D. Nowotka, Counting bordered and primitive words with a fixed weight, Theoret. Comput. Sci. 340 (2005), no. 2, 273-279.
EXAMPLE
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
CROSSREFS
Sequence in context: A227293 A331391 A359442 * A333595 A227509 A279094
KEYWORD
nonn,tabf
AUTHOR
N. J. A. Sloane, Mar 17 2005
STATUS
approved