A008573 Digits of powers of 13.

1, 1, 3, 1, 6, 9, 2, 1, 9, 7, 2, 8, 5, 6, 1, 3, 7, 1, 2, 9, 3, 4, 8, 2, 6, 8, 0, 9, 6, 2, 7, 4, 8, 5, 1, 7, 8, 1, 5, 7, 3, 0, 7, 2, 1, 1, 0, 6, 0, 4, 4, 9, 9, 3, 7, 3, 1, 3, 7, 8, 5, 8, 4, 9, 1, 8, 4, 9, 1, 7, 9, 2, 1, 6, 0, 3, 9, 4, 0, 3, 7, 2, 3, 2, 9, 8, 0, 8, 5, 1, 2, 2, 4, 8, 1, 3, 0, 2, 8

Offset

0,3

Comments

The constant whose decimal expansion is this sequence is irrational (Mahler, 1981). - Amiram Eldar, Mar 23 2025

Links

Seiichi Manyama, Rows n = 0..100, flattened

Kurt Mahler, On some irrational decimal fractions, Journal of Number Theory, Vol. 13, No. 2 (1981), pp. 268-269.

Example

Triangle begins:
  1;
  1, 3;
  1, 6, 9;
  2, 1, 9, 7;
  2, 8, 5, 6, 1;
  3, 7, 1, 2, 9, 3;
  4, 8, 2, 6, 8, 0, 9;
  ...

Mathematica

IntegerDigits/@(13^Range[0, 20])//Flatten (* Harvey P. Dale, Oct 24 2017 *)

Crossrefs

Cf. A001022.

Cf. A000455, A008564, A008565, A008566, A008567, A008568, A008569, A008570, A008571, A008572, A010054.

Sequence in context: A144877 A049410 A013610 * A089710 A065918 A362695

Adjacent sequences: A008570 A008571 A008572 * A008574 A008575 A008576

Keyword

nonn,base,easy,tabf

Author

N. J. A. Sloane

Status

approved