Number of vertices formed by drawing the lines connecting any two of the 2*(n+2) perimeter points of a 3 X (n+1) rectangular grid of points (or equally, a 2 X n grid of squares).
A331763
Number of vertices formed by drawing the lines connecting any two of the 2*(n+2) perimeter points of a 3 X (n+1) rectangular grid of points (or equally, a 2 X n grid of squares).
Terms
- a(0) =13a(1) =37a(2) =99a(3) =213a(4) =401a(5) =657a(6) =1085a(7) =1619a(8) =2327a(9) =3257a(10) =4457a(11) =5883a(12) =7751a(13) =9885a(14) =12403a(15) =15513a(16) =19131a(17) =23181a(18) =28115a(19) =33601a(20) =39745a(21) =46821a(22) =54865a(23) =63733a(24) =73879a(25) =84889a(26) =97063a(27) =110639a(28) =125649a(29) =141797
External references
- oeis: A331763