Number of maximum independent vertex sets in the n-triangular honeycomb grid graph.

Terms

a(0) =1a(1) =1a(2) =8a(3) =9a(4) =1a(5) =125a(6) =196a(7) =1a(8) =2744a(9) =6084a(10) =1a(11) =74088a(12) =219024a(13) =1a(14) =2299968a(15) =8450649a(16) =1a(17) =78953589a(18) =338265664a(19) =1a(20) =2924207000a(21) =13840346025a(22) =1a(23) =114933031928a(24) =574510941225a(25) =1a(28) =1