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 A335795 #8 Jun 26 2020 15:24:13 %S A335795 0,1,6,6,18,6,30,18,54,6,30,30,78,18,90,54,150,6,30,30,78,30,126,78, %T A335795 222,18,90,90,234,54,246,150,390,6,30,30,78,30,126,78,222,30,126,126, %U A335795 318,78,366,222,606,18,90,90,234,90,378,234,666,54,246,246,630,150,630,390,966,6,30,30,78,30,126,78,222,30,126,126,318 %N A335795 First differences of A335794. %C A335795 Position of 6 occurs every 2^(n-1) + 1 for n > 0. %C A335795 Position of 18 appears to occur according to the tetranacci numbers (cf. A000288): 4, 7, 13, 25, 49, ... %D A335795 S. M. Ulam, On some mathematical problems connected with patterns of growth of figures, pp. 215-224 of R. E. Bellman, ed., Mathematical Problems in the Biological Sciences, Proc. Sympos. Applied Math., Vol. 14, Amer. Math. Soc., 1962 (see Example 6, page 224). %e A335795 When written as a triangle: %e A335795 0 %e A335795 1 %e A335795 6 %e A335795 6 18 %e A335795 6 30 18 54 %e A335795 6 30 30 78 18 90 54 150 %e A335795 6 30 30 78 30 126 78 222 18 90 90 234 54 246 150 390 %e A335795 ... %Y A335795 Cf. A000288, A151723, A335794. %K A335795 nonn %O A335795 0,3 %A A335795 _Cody B Duncan_, Jun 23 2020