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A075441

a(n) is the number of solutions to the n-term Znám problem.

0, 0, 0, 2, 5, 18, 96

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OFFSET

2,4

COMMENTS

Three results are missing for a(7) in Eric Weisstein's World of Mathematics: [2, 3, 7, 43, 3263, 4051, 2558951] [2, 3, 11, 25, 29, 1097, 2753] [2, 3, 13, 25, 29, 67, 2981]. - Zhao Hui Du, Jan 24 2010

LINKS

Table of n, a(n) for n=2..8.

Zhao Hui Du, all results for a(8). [Broken link]

Eric Weisstein's World of Mathematics, Znám's Problem.

CROSSREFS

Cf. A075461.

Sequence in context: A058119 A335547 A367012 * A187008 A333837 A075634

Adjacent sequences: A075438 A075439 A075440 * A075442 A075443 A075444

KEYWORD

nonn,more,hard

AUTHOR

Eric W. Weisstein, Sep 16 2002

EXTENSIONS

a(7)-a(8) corrected by Zhao Hui Du, Jan 24 2010

STATUS

approved

URL: https://oeis.org/A075441

⇱ A075441 - OEIS