A279860 a(n) is the first n-digit substring to repeat in the decimal expansion of e.

2, 18, 182, 1828, 98793, 987931, 4349076, 82549802, 450388721, 5291493974, 72883660263, 476539957100

Offset

1,1

Comments

The first two occurrences of a(4) = 1828 appear consecutively as 18281828.

Links

Table of n, a(n) for n=1..12.

Example

a(2) = 18 because 18 is the first 2-digit number to repeat in the decimal expansion of e = 2.7(18)28(18)...
2 appears at positions 0 and 4.
18 appears at positions 2 and 6.
182 appears at positions 2 and 6.
1828 appears at positions 2 and 6.
98793 appears at positions 478 and 494.
987931 appears at positions 478 and 494.
4349076 appears at positions 170 and 2731.
...

Crossrefs

Cf. A001113, A197123.

Sequence in context: A183285 A359458 A129627 * A362731 A138413 A066274

Adjacent sequences: A279857 A279858 A279859 * A279861 A279862 A279863

Keyword

nonn,base,more

Author

Bobby Jacobs, Dec 20 2016

Extensions

a(8)-a(12) from Alois P. Heinz, Dec 21 2016

Status

approved