

A331881


a(n) is the first ndigit substring to occur n times in the decimal expansion of the fractional part of Pi.


1




OFFSET

1,2


LINKS

Table of n, a(n) for n=1..8.


EXAMPLE

a(1) = 1, because '1' is the first 1digit string appearing 1 time (at position 1);
a(2) = 26, because '26' is the first 2digit string appearing 2 times (at positions 6 and 21);
a(3) = 446, because '446' is the first 3digit string appearing 3 times (at positions 125, 182 and 217);
and so on.


CROSSREFS

Cf. A000796, A197123.
Cf. A331882 (the number of digits needed to find the repeated ndigit strings).
Sequence in context: A024438 A025999 A028058 * A024170 A028042 A023956
Adjacent sequences: A331878 A331879 A331880 * A331882 A331883 A331884


KEYWORD

base,nonn,hard,more


AUTHOR

Stijn Dierckx, Jan 30 2020


STATUS

approved



