A123824 - OEIS

A123824

Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 2 X 3.

%I #33 Nov 17 2020 14:09:20

%S 1,16,697,34958,1947321,114675898,7026150623,443114008903,

%T 28575438072945,1875587744568411

%N Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 2 X 3.

%H Matthias Simon, <a href="/A123824/a123824_2.cpp.txt">Program to compute a(1)...a(10)</a>

%Y Cf. A112389, A123762 - A123827, A123829 - A123849.

%K nonn,hard,more

%O 1,2

%A _Søren Eilers_, Oct 29 2006

%E a(9) from _Matthias Simon_, Aug 29 2020

%E a(10) from _Matthias Simon_, Nov 15 2020