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 A175098 #8 Jun 02 2025 02:47:15 %S A175098 0,3,5,9,12,16,20,26,31,35,39,45,51,59,67,79,88,92,96,102,108,116,124, %T A175098 136,146,154,162,174,186,202,218,242,259,263,267,273,279,287,295,307, %U A175098 317,325,333,345,357,373,389,413,431,439,447,459,471,487,503,527,547 %N A175098 Number of lattice points covered at the n-th stage of the leftist toothpicks A151566. %H A175098 David Applegate, Omar E. Pol and N. J. A. Sloane, <a href="/A000695/a000695_1.pdf">The Toothpick Sequence and Other Sequences from Cellular Automata</a>, Congressus Numerantium, Vol. 206 (2010), 157-191. [There is a typo in Theorem 6: (13) should read u(n) = 4.3^(wt(n-1)-1) for n >= 2.] %H A175098 N. J. A. Sloane, <a href="/wiki/Catalog_of_Toothpick_and_CA_Sequences_in_OEIS">Catalog of Toothpick and Cellular Automata Sequences in the OEIS</a> %Y A175098 Cf. A147614. %K A175098 nonn %O A175098 0,2 %A A175098 _R. J. Mathar_, Feb 04 2010