A060402 Continued fraction expansion of tanh(Pi).

0, 1, 267, 4, 14, 1, 2, 1, 2, 2, 1, 2, 3, 8, 3, 1, 5, 4, 1, 14, 10, 1, 20, 38, 1, 2, 7, 5, 2, 1, 10, 1, 6, 1, 6, 1, 2, 3, 2, 1, 7, 1, 1, 5, 12, 2, 1, 1, 1, 2, 1, 1, 1, 34, 1, 8, 1, 33, 1, 4, 7, 1, 2, 56, 1, 3, 1, 34, 9, 1, 1, 7, 1, 3, 1, 7, 1, 4, 3, 1, 2, 14, 1, 10, 2, 51, 1, 6, 7, 17, 1, 14, 1, 8, 1, 1

Offset

0,3

References

J. M. Borwein, D. H. Bailey and R. Girgensohn, Experimentation in Mathematics, A K Peters, Ltd., Natick, MA, 2004. x+357 pp. See p. 11.

Links

Harry J. Smith, Table of n, a(n) for n = 0..20000

Example

0.996272076220749944264690... = 0 + 1/(1 + 1/(267 + 1/(4 + 1/(14 + ...)))). - Harry J. Smith, Jul 04 2009

Maple

with(numtheory): c := cfrac (tanh(Pi), 300, 'quotients');

Prog

(PARI) { allocatemem(932245000); default(realprecision, 21000); x=contfrac(tanh(Pi)); for (n=0, 20000, write("b060402.txt", n, " ", x[n+1])); } \\ Harry J. Smith, Jul 04 2009

Crossrefs

Cf. A083124, A190352.

Sequence in context: A278625 A144662 A278307 * A306120 A232106 A049014

Adjacent sequences: A060399 A060400 A060401 * A060403 A060404 A060405

Keyword

nonn,cofr,easy

Author

Bill Gosper, Apr 04 2001

Extensions

More terms from James A. Sellers, Apr 06 2001

Status

approved