login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A080406 Boustrophedon transform of the continued fraction of Pi (cf. A001203). 3
3, 10, 32, 73, 457, 1994, 6407, 29489, 148253, 852592, 5420543, 37975111, 290066507, 2400720769, 21396506651, 204322668174, 2081209926313, 22523982873141, 258105780607144, 3121989826825492, 39750408190737416 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..20.

J. Millar, N. J. A. Sloane and N. E. Young, A new operation on sequences: the Boustrophedon on transform, J.Combin. Theory, 17A 44-54 1996 (Abstract, pdf, ps).

N. J. A. Sloane, Transforms

Index entries for sequences related to boustrophedon transform

FORMULA

a(n) appears to be asymptotic to C*n!*(2/Pi)^n where C=136.651536367325329682973604897976758877614262731284965133228708820... - Benoit Cloitre and Mark Hudson (mrmarkhudson(AT)hotmail.com)

EXAMPLE

We simply apply the Boustrophedon transform to [3,7,15,1,292,1,1,1,...]

CROSSREFS

Cf. A001203, A000796.

Sequence in context: A001403 A072136 A286444 * A036682 A104270 A038731

Adjacent sequences:  A080403 A080404 A080405 * A080407 A080408 A080409

KEYWORD

nonn,easy

AUTHOR

Mark Hudson (mrmarkhudson(AT)hotmail.com), Feb 17 2003

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 3 00:35 EDT 2020. Contains 333195 sequences. (Running on oeis4.)