Number of edges 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).
A331765
Number of edges 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) =28a(1) =92a(2) =240a(3) =508a(4) =944a(5) =1548a(6) =2520a(7) =3754a(8) =5392a(9) =7528a(10) =10296a(11) =13570a(12) =17844a(13) =22768a(14) =28584a(15) =35704a(16) =44048a(17) =53380a(18) =64728a(19) =77292a(20) =91500a(21) =107828a(22) =126408a(23) =146772a(24) =170080a(25) =195580a(26) =223764a(27) =255010a(28) =289792a(29) =326996
External references
- oeis: A331765