A278977 Number of initial digits of ternary Pi wherein the digit counts of zeros and ones are exactly equal.

0, 2, 4, 7, 9, 15, 17, 18, 22, 23, 1480, 1483, 1485, 1487, 1488, 1492, 1494, 1498, 1499, 1503, 1504, 1507, 1508, 1511, 1512, 1516, 1518, 1529, 1537, 1539, 1540, 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

Offset: 1

Author

Hans Havermann, Dec 03 2016

Keywords

• nonn
• base

Comments

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.

Examples

			Ternary Pi is 10.01021101222201021100211...
0 is in the sequence because the first 0 digits contain 0 zeros and 0 ones.
22 is in the sequence because the first 22 digits contain 8 zeros and 8 ones.
23 is in the sequence because the first 23 digits contain 8 zeros and 8 ones.
		

Links

• Hans Havermann, Table of n, a(n) for n = 1..1194

Crossrefs

Cf. A004602, A039624, A278974, A278978, A278979.