Triangle read by rows: Take a hexagram with all diagonals drawn, as in A331908. Then T(n,k) = number of k-sided polygons in that figure for k = 3, 4, ..., n+5.
A331909
Triangle read by rows: Take a hexagram with all diagonals drawn, as in A331908. Then T(n,k) = number of k-sided polygons in that figure for k = 3, 4, ..., n+5.
Terms
- a(0) =132a(1) =36a(2) =0a(3) =0a(4) =2052a(5) =1188a(6) =324a(7) =24a(8) =0a(9) =10440a(10) =7956a(11) =1728a(12) =300a(13) =0a(14) =0a(15) =33672a(16) =28812a(17) =9276a(18) =1836a(19) =228a(20) =24a(21) =12a(22) =83040a(23) =75276a(24) =24948a(25) =5436a(26) =708a(27) =60a(28) =0a(29) =0
External references
- oeis: A331909