A196993 Number of fixed polypons with n cells (division into triangles is significant).

6, 9, 14, 24, 42, 77, 144, 276, 538, 1065, 2136, 4321, 8790, 17967, 36890, 76050, 157380, 326824, 680880, 1422570, 2979572, 6254175, 13153242, 27712901, 58487796, 123632910, 261722022, 554800719, 1177553610, 2502256578, 5322993522

Offset: 1

Author

Joseph Myers, Oct 08 2011

Keywords

• nonn
• hard

Links

• Eric Weisstein's World of Mathematics, Polypon

Crossrefs

Cf. A057784, A151531, A151532, A151533.

Extensions

a(27)-a(31) from Johann Peters, Dec 16 2024