A153469 1/6 of the number of 6-colorings of a planar n X n X n triangular grid.

1, 20, 1280, 262400, 172336640, 362631649280, 2444725581455360, 52804515715254149120, 3654168284344820145766400, 810181920328696211112009728000, 575510260400583306243122436913233920

Offset: 1

Author

R. H. Hardin, Dec 27 2008

Keywords

• nonn

Crossrefs

6th row of A182797/6.

Extensions

a(10)-a(11) from Alois P. Heinz, Dec 03 2010