Irregular table read by rows: Take a decagon with all diagonals drawn, as in A333139. Then T(n,k) = number of k-sided polygons in that figure for k >= 3.

A332417

Irregular table read by rows: Take a decagon with all diagonals drawn, as in A333139. Then T(n,k) = number of k-sided polygons in that figure for k >= 3.

Terms

    a(0) =120a(1) =90a(2) =10a(3) =2040a(4) =1580a(5) =460a(6) =140a(7) =10860a(8) =8570a(9) =4170a(10) =1380a(11) =210a(12) =20a(13) =10a(14) =34360a(15) =30420a(16) =14240a(17) =4020a(18) =1120a(19) =100a(20) =20a(21) =85600a(22) =76920a(23) =38610a(24) =13360a(25) =2650a(26) =550a(27) =110a(28) =176760a(29) =166400

External references