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 A278979 #10 Dec 13 2017 04:19:42 %S A278979 0,14,15,18,37,38,215,218,267,280,282,290,326,328,329,331,332,333,346, %T A278979 347,348,350,403,404,405,425,430,431,433,435,440,454,455,456,457,458, %U A278979 575,577,578,579,581,590,630,631,633,634,635,637,643,644,645,646,647,648,651,652,653,654,655,658,659,663,664,666,763,770,935,937,938,950,952,1124 %N A278979 Number of initial digits of ternary Pi wherein the digit counts of ones and twos are exactly equal. %H A278979 Hans Havermann, <a href="/A278979/b278979.txt">Table of n, a(n) for n = 1..10000</a> %H A278979 Hans Havermann, <a href="http://chesswanks.com/seq/b278979.txt">Table of n, a(n) for n = 1..96619</a> %e A278979 Ternary Pi is 10.01021101222201021100211... %e A278979 0 is in the sequence because the first 0 digits contain 0 ones and 0 twos. %e A278979 14 is in the sequence because the first 14 digits contain 5 ones and 5 twos. %e A278979 15 is in the sequence because the first 15 digits contain 5 ones and 5 twos. %Y A278979 Cf. A004602, A039624, A278976, A278977, A278978. %K A278979 nonn,base %O A278979 1,2 %A A278979 _Hans Havermann_, Dec 03 2016