A087329 Independence numbers for KT_4 knight on hexagonal board.
1, 3, 3, 4, 7, 9, 12, 15, 19, 22, 25, 28, 37, 40, 46, 51, 61, 66, 71, 76, 91, 96, 103, 111, 127
Offset: 1
Links
- J.-P. Bode and H. Harborth, Independence for knights on hexagon and triangle boards, Discrete Math., 272 (2003), 27-35.
- Andy Huchala, Python program.
Formula
a(4*n+1) = 3*n^2 + 3*n + 1 = A003215(n) from Bode and Harborth. - Andy Huchala, Mar 16 2024
Extensions
a(17)-a(25) from Andy Huchala, Mar 16 2024