A016648 Decimal expansion of log(25).

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

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn
• cons

Examples

			3.218875824868200749201518666452375279051202708537035443825295782948357....
		

References

• M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards Applied Math. Series 55, 1964 (and various reprintings), p. 2.

Links

• Harry J. Smith, Table of n, a(n) for n = 1..20000
• M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards, Applied Math. Series 55, Tenth Printing, 1972 [alternative scanned copy].
• Index entries for transcendental numbers

Crossrefs

Cf. A000045, A016453 (continued fraction), A016628.

Programs

Mathematica

RealDigits[Log[25], 10, 120][[1]] (* Vincenzo Librandi, Jun 21 2015 *)

PARI

default(realprecision, 20080); x=log(25); for (n=1, 20000, d=floor(x); x=(x-d)*10; write("b016648.txt", n, " ", d)); \\ Harry J. Smith, May 19 2009

Formula

Equals 10 * Sum_{k>=1} F(k)^2/(k * 4^k), where F(k) is the k-th Fibonacci number (A000045). - Amiram Eldar, Aug 09 2020

Equals 2*A016628. - Alois P. Heinz, Aug 07 2023