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 A244362 #17 Oct 23 2014 21:06:16 %S A244362 2,6,12,20,28,40,50,66,82,102,116,140,156,182,208,240,260,296,318,358, %T A244362 394,432,458,506,540,584,628,684 %N A244362 Total number of toothpicks after n-th stage in the toothpick structure of the symmetric representation of sigma in the first quadrant (without the axes x and y). %C A244362 Partial sums of A244363. %F A244362 a(n) = 2*A244360(n). %F A244362 a(n) = A244370(n)/4. - _Omar E. Pol_, Oct 18 2014 %e A244362 Illustration of the structure after 7 stages (Contains 50 toothpicks): %e A244362 . %e A244362 . _ _ _ _ %e A244362 . _ _ _ _| %e A244362 . _ _ _ |_ %e A244362 . _ _ _| |_ _ %e A244362 . _ _ |_ _ | | %e A244362 . _ _|_ | | | | %e A244362 . _ | | | | | | %e A244362 . | | | | | | | %e A244362 . %e A244362 . 1 2 3 4 5 6 7 %e A244362 . %Y A244362 Cf. A000203, A237270, A237271, A237593, A244360, A244361, A244363, A244370, A244371. %K A244362 nonn,more %O A244362 1,1 %A A244362 _Omar E. Pol_, Jun 26 2014 %E A244362 More terms from _Omar E. Pol_, Oct 18 2014