cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A080347 Number of shuffles in Guy's shuffle (A035485) corresponding to the terms in A080346.

Original entry on oeis.org

1, 7, 41, 80, 219, 313, 1579, 4250, 32327, 96057, 203774, 321975, 394664, 1430433, 5886828, 9140809, 35697590, 101647281, 453696237
Offset: 1

Views

Author

Jud McCranie, Feb 16 2003, revised Mar 08 2003

Keywords

Comments

Card #1 being at the top before the first shuffle is not counted. The card at the top is in A080346. Card 170 reaches the top for the 15th time after 5886828 shuffles and for the 16th time after 9140809 shuffles, so a(15) <= 5886828 and a(16) <= 9140809.

Examples

			Card #14 is the first card to reach the top position 3 times after 41 shuffles and it is the first card to do so, so a(3)=41.

Crossrefs

Cf. A035485, A057976, A080346.

Programs

Extensions

a(2) and a(9) corrected by Michael S. Branicky, Feb 01 2021
a(15)-a(16) from Frank A. Stevenson, Feb 04 2024
a(17)-a(19) from Frank A. Stevenson, Feb 09 2024
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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