Triangle read by rows: Take a pentagon with all diagonals drawn, as in A331929. Then T(n,k) = number of k-sided polygons in that figure for k = 3, 4, ..., n+5.
A331939
Triangle read by rows: Take a pentagon with all diagonals drawn, as in A331929. Then T(n,k) = number of k-sided polygons in that figure for k = 3, 4, ..., n+5.
Terms
- a(0) =10a(1) =0a(2) =1a(3) =0a(4) =120a(5) =40a(6) =10a(7) =0a(8) =0a(9) =605a(10) =290a(11) =166a(12) =95a(13) =0a(14) =5a(15) =1750a(16) =1420a(17) =550a(18) =150a(19) =30a(20) =0a(21) =0a(22) =4315a(23) =3740a(24) =1920a(25) =640a(26) =95a(27) =20a(28) =5a(29) =6
External references
- oeis: A331939