A121698 - cp's OEIS frontend

A121698 Triangle read by rows: T(n,k) is the number of deco polyominoes of height n and having k columns ending at an even level (1<=k<=n). A deco polyomino is a directed column-convex polyomino in which the height, measured along the diagonal, is attained only in the last column.

n	a(n)
1	1
2	1
3	1
4	2
5	2
6	2
7	6
8	8
9	7
10	3
11	16
12	36
13	37
14	23
15	8
16	62
17	172
18	220
19	166
20	80
21	20
22	230
23	844
24	1383
25	1338
26	835
27	338
28	72
29	1114
30	4796
31	9331
32	10828
33	8265
34	4282
35	1452
36	252
37	5268
38	27450
39	64612
40	91023
41	85248
42	55445
43	25158
44	7524
45	1152
46	30702
47	181606
48	489847
49	798355

[1, 1, 1, 2, 2, 2, 6, 8, 7, 3, 16, 36, 37, 23, 8, 62, 172, 220, 166, 80, 20, 230, 844, 1383, 1338, 835, 338, 72, 1114, 4796, 9331, 10828, 8265, 4282, 1452, 252, 5268, 27450, 64612, 91023, 85248, 55445, 25158, 7524, 1152, 30702, 181606, 489847, 798355]

cp's OEIS Frontend

A121698 Triangle read by rows: T(n,k) is the number of deco polyominoes of height n and having k columns ending at an even level (1<=k<=n). A deco polyomino is a directed column-convex polyomino in which the height, measured along the diagonal, is attained only in the last column.

Table of values

List of values