A008570 Digits of powers of 9.

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

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• base
• easy
• tabf

Comments

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

Examples

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

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. A001019.

Cf. A000455, A008564, A008565, A008566, A008567, A008568, A008569, A008571, A008572, A008573, A010054.

Programs

Mathematica

Flatten[IntegerDigits/@(9^Range[0,20])] (* Harvey P. Dale, Nov 17 2024 *)