A335803 Irregular table read by rows: n-sect the angles of a decagon. Then T(n,k) = number of k-sided polygons in that figure for k >= 3.

0, 0, 0, 0, 0, 0, 0, 1, 10, 30, 120, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 50, 150, 240, 60, 20, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 250, 140, 40, 10, 300, 510, 130, 30, 0, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 120, 90, 10

Offset

1,9

Links

Table of n, a(n) for n=1..71.

Example

The table begins
0, 0, 0, 0, 0, 0, 0, 1;
10;
30, 120, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1;
50;
150, 240, 60, 20, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1;
250, 140, 40, 10;
300, 510, 130, 30, 0, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1;

Crossrefs

Cf. A332417 (n-sected sides, not angles), A335800 (regions), A335801 (vertices), A335802 (edges).

Sequence in context: A307307 A185829 A301664 * A259136 A098684 A268117

Adjacent sequences: A335800 A335801 A335802 * A335804 A335805 A335806

Keyword

nonn,tabf

Author

Lars Blomberg, Jun 25 2020

Status

approved