A075125 - cp's OEIS frontend

A075125 Number of parallelogram polyominoes of site-perimeter n (also called staircase polyominoes, although that term is overused).

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	2
7	2
8	5
9	10
10	21
11	46
12	102
13	230
14	526
15	1216
16	2838
17	6678
18	15825
19	37734
20	90469
21	217962
22	527418
23	1281250
24	3123603
25	7639784
26	18740795
27	46096732
28	113666820
29	280928470
30	695796891
31	1726744166
32	4293121609
33	10692145390
34	26671959375
35	66634602702

[0, 0, 0, 1, 0, 2, 2, 5, 10, 21, 46, 102, 230, 526, 1216, 2838, 6678, 15825, 37734, 90469, 217962, 527418, 1281250, 3123603, 7639784, 18740795, 46096732, 113666820, 280928470, 695796891, 1726744166, 4293121609, 10692145390, 26671959375, 66634602702]

cp's OEIS Frontend

A075125 Number of parallelogram polyominoes of site-perimeter n (also called staircase polyominoes, although that term is overused).

Table of values

List of values