A080406 Boustrophedon transform of the continued fraction of Pi (cf. A001203).

3, 10, 32, 73, 457, 1994, 6407, 29489, 148253, 852592, 5420543, 37975111, 290066507, 2400720769, 21396506651, 204322668174, 2081209926313, 22523982873141, 258105780607144, 3121989826825492, 39750408190737416

Offset: 0

Author

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

Keywords

• nonn
• easy

Examples

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

Links

• J. Millar, N. J. A. Sloane and N. E. Young, A new operation on sequences: the Boustrophedon transform, J.Combin. Theory, 17A (1996) 44-54 (Abstract, pdf, ps).
• N. J. A. Sloane, Transforms
• Index entries for sequences related to boustrophedon transform

Crossrefs

Cf. A001203, A000796.

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)