OFFSET

1,2

LINKS

Hans Havermann, Table of n, a(n) for n = 1..10000

EXAMPLE

Ternary Pi is 10.01021101222201021100211...

With no digits of ternary Pi, there are an equal number of ones and twos. 1 is in the sequence because with the initial digit of ternary Pi, 1 has now taken the count lead over 2 (1-0). 216 is the next term because with 216 initial digits of ternary Pi, 2 has now taken the count lead over 1 (75-74). 334 is the next term because with 334 initial digits, 1 regains the count lead over 2 (119-118).

MATHEMATICA

pib = RealDigits[Pi, 3, 5000000][[1]]; flag = -1; z = o = t = 0; k = 1; lst = {}; While[k < 5000001, Switch[ pib[[k]], 0, z++, 1, o++, 2, t++]; If[(o > t && flag != 1) || (o < t && flag != -1), AppendTo[lst, k]; flag = -flag]; k++]; lst

CROSSREFS

KEYWORD

nonn,base

AUTHOR

Hans Havermann and Robert G. Wilson v, Dec 03 2016

STATUS

approved