A102416 Triangle read by rows: the numbers B_2(n,k) from the Harju and Nowotka paper.

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

Author

N. J. A. Sloane, Mar 17 2005

Keywords

• nonn
• tabf

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.

Examples

			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
		

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.

Crossrefs

Cf. A102864, A103179.