A030224 Triangular polyominoes (n-iamonds) without bilateral symmetry (holes are allowed).

0, 0, 0, 1, 2, 7, 19, 54, 147, 418, 1150, 3254, 9138, 25953, 73717, 210719, 603370, 1734739, 4998542, 14444576, 41829991, 121406927, 353029078, 1028417980, 3000754648, 8769118355, 25661830891, 75194886765, 220605144778, 647942827064, 1905103686527, 5607037213434, 16517892572160, 48703328674762

Offset: 1

Author

David W. Wilson

Keywords

• nonn

Links

• John Mason, Table of n, a(n) for n = 1..52

Crossrefs

Cf. A000577, A006534, A030223, A030224.

Extensions

More terms from Joseph Myers, Sep 24 2002

More terms from John Mason, Oct 28 2023