No-3-in-line problem for equilateral triangle array of side n.
A007402
No-3-in-line problem for equilateral triangle array of side n.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =1a(4) =2a(5) =15a(6) =1a(7) =5a(8) =7a(9) =971a(10) =20a(11) =276
External references
- oeis: A007402