A008566 Digits of powers of 5.

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

Offset

0,2

Comments

Irregular table with row length sequence A210435. - Jason Kimberley, Nov 26 2012

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;
  5;
  2, 5;
  1, 2, 5;
  6, 2, 5;
  3, 1, 2, 5;
  1, 5, 6, 2, 5;
  7, 8, 1, 2, 5,
  3, 9, 0, 6, 2, 5;
  ...

Mathematica

Flatten[IntegerDigits/@(5^Range[0, 20])] (* Harvey P. Dale, Jan 18 2012 *)

Crossrefs

Cf. A000351, A210435.

Cf. A000455, A008564, A008565, A008567, A008568, A008569, A008570, A008571, A008572, A008573, A010054.

Sequence in context: A324860 A373537 A388655 * A111129 A168464 A382579

Adjacent sequences: A008563 A008564 A008565 * A008567 A008568 A008569

Keyword

nonn,base,easy,tabf

Author

N. J. A. Sloane

Status

approved