Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with every one adjacent to exactly 1 other one.
A153984
Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with every one adjacent to exactly 1 other one.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =2a(6) =3a(7) =2a(8) =6a(9) =7a(10) =11a(11) =23a(12) =54a(13) =60a(14) =238a(15) =445a(16) =901a(17) =2706a(18) =9076a(19) =14494a(20) =80321a(21) =212453a(22) =613603a(23) =2681494a(24) =12847248a(25) =29154102a(26) =230660451a(27) =862931932a(28) =3568146072a(29) =22105400251
External references
- oeis: A153984