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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 (list; graph; refs; listen; history; text; internal format)
 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 Cf. A102864, A103179. Sequence in context: A159749 A227293 A331391 * A333595 A227509 A279094 Adjacent sequences:  A102413 A102414 A102415 * A102417 A102418 A102419 KEYWORD nonn,tabf AUTHOR N. J. A. Sloane, Mar 17 2005 STATUS approved

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Last modified May 7 10:18 EDT 2021. Contains 343650 sequences. (Running on oeis4.)