This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A102416 #7 Jul 17 2020 00:34:05 %S A102416 2,2,4,2,16,4,28,6,4,56,14,8,108,30,16,6,216,60,28,12,424,124,60,24, %T A102416 12,848,248,128,48,24,1684,492,244,90,48,20,3368,984,512,186,96,40, %U A102416 6712,1960,1000,384,192,80,40,13424,3920,2032,756,372,160,80,26808 %N A102416 Triangle read by rows: the numbers B_2(n,k) from the Harju and Nowotka paper. %C A102416 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_. %H A102416 T. Harju and D. Nowotka, <a href="http://oldtucs.abo.fi/publications/attachment.php?fname=TR630.pdf">Counting bordered and primitive words with a fixed weight</a>, TUCS Technical Report, No 630, Turku, November 2004. %H A102416 T. Harju and D. Nowotka, <a href="https://doi.org/10.1016/j.tcs.2005.03.040">Counting bordered and primitive words with a fixed weight</a>, Theoret. Comput. Sci. 340 (2005), no. 2, 273-279. %e A102416 Triangle begins: %e A102416 2 %e A102416 2 %e A102416 4, 2 %e A102416 16, 4 %e A102416 28, 6, 4 %e A102416 56, 14, 8 %e A102416 108, 30, 16, 6 %e A102416 216, 60, 28, 12 %e A102416 424, 124, 60, 24, 12 %e A102416 848, 248, 128, 48, 24 %e A102416 1684, 492, 244, 90, 48, 20 %Y A102416 Cf. A102864, A103179. %K A102416 nonn,tabf %O A102416 0,1 %A A102416 _N. J. A. Sloane_, Mar 17 2005