Number of ways to place 5 points on a triangular grid of side n so that no two of them are adjacent.
A239571
Number of ways to place 5 points on a triangular grid of side n so that no two of them are adjacent.
Terms
- a(0) =0a(1) =0a(2) =27a(3) =999a(4) =11565a(5) =74811a(6) =342042a(7) =1239525a(8) =3799488a(9) =10259640a(10) =25076952a(11) =56552364a(12) =119324403a(13) =238062357a(14) =452774595a(15) =826245798a(16) =1454229216a(17) =2479147536a(18) =4108199481a(19) =6636929805a(20) =10479498849a(21) =16207085223a(22) =24596072424a(23) =36687908235a(24) =53862785520a(25) =77929575480
External references
- oeis: A239571