Number of 6-cycles in the n-triangular honeycomb obtuse knight graph.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =4a(5) =13a(6) =98a(7) =415a(8) =1151a(9) =2471a(10) =4385a(11) =6893a(12) =9995a(13) =13691a(14) =17981a(15) =22865a(16) =28343a(17) =34415a(18) =41081a(19) =48341a(20) =56195a(21) =64643a(22) =73685a(23) =83321a(24) =93551a(25) =104375a(26) =115793a(27) =127805a(28) =140411a(29) =153611