A278327 Decimal expansion of 1/e - 1/e^2.

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

Offset: 0

Author

Alois P. Heinz, Nov 18 2016

Keywords

• nonn
• cons

Comments

The probability, as n = 2^k increases without bound, that a randomized skip list with n elements and p = 1/2 has exactly k levels.

Examples

			0.232544157934829629701524275188976464...
		

Links

• Alois P. Heinz, Table of n, a(n) for n = 0..10000
• Wikipedia, Skip list.

Crossrefs

Cf. A001113, A068985, A072334, A091131, A092553, A158466.

Programs

Mathematica

RealDigits[1/E - 1/E^2, 10, 120][[1]] (* Amiram Eldar, May 27 2023 *)

Formula

Equals 1/A001113 - 1/A072334 = A068985 - A092553.

Equals A091131 / A072334 = A091131 * A092553.