A309208 Decimal expansion of (3 tanh (3 tanh (3 tanh (...))))^(-2).

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

Offset

0,3

Comments

This is the decimal expansion of 1/x^2 where x is the constant defined in A309211.

Links

Table of n, a(n) for n=0..105.

W. M. Gosper, Material from Bill Gosper's Computers & Math talk, M.I.T., 1989, i+38+1 pages, annotated and scanned, included with the author's permission. (There are many blank pages because about half of the original pages were two-sided, half were one-sided.)

Example

.1122528288730582219511299311388265401208...

Crossrefs

Cf. A309207, A309211.

Sequence in context: A025124 A030996 A368580 * A293225 A353851 A305798

Adjacent sequences: A309205 A309206 A309207 * A309209 A309210 A309211

Keyword

nonn,cons

Author

N. J. A. Sloane, Jul 29 2019

Extensions

More terms from Daniel Suteu, Jul 30 2019

Status

approved