Consider the figure made up of a row of n adjacent congruent rectangles, with diagonals of all possible rectangles drawn; a(n) = number of interior vertices where exactly two lines cross.
A334701
Consider the figure made up of a row of n adjacent congruent rectangles, with diagonals of all possible rectangles drawn; a(n) = number of interior vertices where exactly two lines cross.
Terms
- a(0) =1a(1) =6a(2) =24a(3) =54a(4) =124a(5) =214a(6) =382a(7) =598a(8) =950a(9) =1334a(10) =1912a(11) =2622a(12) =3624a(13) =4690a(14) =6096a(15) =7686a(16) =9764a(17) =12010a(18) =14866a(19) =18026a(20) =21904a(21) =25918a(22) =30818a(23) =36246a(24) =42654a(25) =49246a(26) =57006a(27) =65334a(28) =75098a(29) =85414
External references
- oeis: A334701