Number of ways to choose three distinct points from a 3 X n grid so that they form an isosceles triangle.
A271912
Number of ways to choose three distinct points from a 3 X n grid so that they form an isosceles triangle.
Terms
- a(0) =0a(1) =10a(2) =36a(3) =68a(4) =108a(5) =150a(6) =200a(7) =252a(8) =312a(9) =374a(10) =444a(11) =516a(12) =596a(13) =678a(14) =768a(15) =860a(16) =960a(17) =1062a(18) =1172a(19) =1284a(20) =1404a(21) =1526a(22) =1656a(23) =1788a(24) =1928a(25) =2070a(26) =2220a(27) =2372a(28) =2532a(29) =2694
External references
- oeis: A271912