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 A267495 #21 Dec 19 2017 18:36:27 %S A267495 22,10213223,10311233,10313314,10313315,10313316,21322314,21322315, %T A267495 21322316,31123314,31123315,31123316,31331415,31331416,31331516, %U A267495 1031223314,1031223315,1031223316,3122331415,3122331416,3122331516,103142132415,104122232415,103142132416,104122232416,314213241516,412223241516,1011112131415,1011112131416,1011112131516,1011112141516,1011113141516,1111213141516,10414213142516,10413223241516,10512223142516,10512213341516,101112213141516 %N A267495 Autobiographical numbers in base 7: numbers which are fixed or belong to a cycle under the operator T. %C A267495 The T operator numerically summarizes the frequency of digits 0 through 6 in that order when they occur in a number. The numbers and the frequency are written in base 7. %C A267495 These are all autobiographical numbers in base 7 which lead to a fixed-point or belong to a cycle. %C A267495 There are three cycles with length 2 (103142132415 /104122232415, 103142132416/104122232416, 314213241516/412223241516), one cycle with length 3 (10512213341516/10512223142516/10414213142516). 29 numbers are fixed-points. %D A267495 Antonia Münchenbach and Nicole Anton George, "Eine Abwandlung der Conway-Folge", contribution to "Jugend forscht" 2016, 2016 %H A267495 Andre Kowacs, <a href="https://arxiv.org/abs/1708.06452">Studies on the Pea Pattern Sequence</a>, arXiv:1708.06452 [math.HO], 2017. %e A267495 10213223 contains one 0, two 1's, three 2's and two 3's, so T(10213223) = 1 0 2 1 3 2 2 3, and this is fixed under T. %e A267495 103142132415 and 104122232415 belong to the cycle of length 2, so %e A267495 T(T(103142132415)) = T(1 0 4 1 2 2 2 3 2 4 1 5) = 1 0 3 1 4 2 1 3 2 4 1 5. %Y A267495 Cf. A047841, A267491, A267492, A267493, A267494, A267495, A267496, A267497, A267498, A267499, A267500, A267502. %K A267495 nonn,base,fini,full %O A267495 1,1 %A A267495 _Antonia Münchenbach_, Jan 16 2016