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

Author

N. J. A. Sloane

Keywords

• nonn
• base
• easy
• tabf

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

Examples

			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;
  ...
		

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.

Crossrefs

Cf. A000351, A210435.

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

Programs

Mathematica

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