login
a(n) is the number of solutions to the n-term Znám problem.
1

%I #21 Oct 20 2023 09:47:45

%S 0,0,0,2,5,18,96

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

%C 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

%H Zhao Hui Du, <a href="http://zdu.spaces.live.com/blog/cns!C95152CB25EF2037!210.entry">all results for a(8)</a>. [Broken link]

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/ZnamsProblem.html">Znám's Problem</a>.

%Y Cf. A075461.

%K nonn,more,hard

%O 2,4

%A _Eric W. Weisstein_, Sep 16 2002

%E a(7)-a(8) corrected by _Zhao Hui Du_, Jan 24 2010