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 A278977 #12 Dec 13 2017 04:19:22 %S A278977 0,2,4,7,9,15,17,18,22,23,1480,1483,1485,1487,1488,1492,1494,1498, %T A278977 1499,1503,1504,1507,1508,1511,1512,1516,1518,1529,1537,1539,1540, %U A278977 1550,1557,1559,1566,1591,1592,1593,1594,1595,1651,1728,1729,1731,1733,1735,1737,1738,1740,1756,1757,1762,1767,1768,1771,1777,1779,1781,1782,1784,1789,66404 %N A278977 Number of initial digits of ternary Pi wherein the digit counts of zeros and ones are exactly equal. %C A278977 The subsequence of number of initial digits of ternary Pi wherein the digit counts of zeros, ones, and twos are all exactly equal begins 0, 15, 18. The next term, if it exists, is > 3^21 > 10^10. %H A278977 Hans Havermann, <a href="/A278977/b278977.txt">Table of n, a(n) for n = 1..1194</a> %e A278977 Ternary Pi is 10.01021101222201021100211... %e A278977 0 is in the sequence because the first 0 digits contain 0 zeros and 0 ones. %e A278977 22 is in the sequence because the first 22 digits contain 8 zeros and 8 ones. %e A278977 23 is in the sequence because the first 23 digits contain 8 zeros and 8 ones. %Y A278977 Cf. A004602, A039624, A278974, A278978, A278979. %K A278977 nonn,base %O A278977 1,2 %A A278977 _Hans Havermann_, Dec 03 2016