A121299 - cp's OEIS frontend

A121299 Sum of the heights of all directed column-convex polyominoes of area n; here by the height of a polyomino one means the number of lines of slope -1 that pass through the centers of the polyomino cells.

n	a(n)
1	1
2	4
3	14
4	47
5	149
6	458
7	1373
8	4046
9	11765
10	33857
11	96611
12	273760
13	771164
14	2161352
15	6031104
16	16764719
17	46442640
18	128268379
19	353296944
20	970717966
21	2661204271
22	7280832780
23	19882745230
24	54203791062
25	147536291969
26	400991600305

[1, 4, 14, 47, 149, 458, 1373, 4046, 11765, 33857, 96611, 273760, 771164, 2161352, 6031104, 16764719, 46442640, 128268379, 353296944, 970717966, 2661204271, 7280832780, 19882745230, 54203791062, 147536291969, 400991600305]

cp's OEIS Frontend

A121299 Sum of the heights of all directed column-convex polyominoes of area n; here by the height of a polyomino one means the number of lines of slope -1 that pass through the centers of the polyomino cells.

Table of values

List of values