A134819 - cp's OEIS frontend

A134819 Irregular triangle read by rows: the number of hydrocarbon structures that can be drawn with a given number of carbons and units of unsaturation.

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	2
7	3
8	2
9	1
10	2
11	5
12	9
13	11
14	7
15	3
16	3
17	10
18	26
19	40
20	40
21	21
22	6
23	5
24	25
25	77
26	159
27	217
28	185
29	85
30	19
31	9
32	56
33	222
34	575
35	1031
36	1230
37	920
38	356
39	50
40	18
41	139
42	654
43	2082
44	4679
45	7437
46	7982
47	5308
48	1804
49	204
50	35
51	338
52	1902
53	7244
54	19983
55	40139
56	57771
57	56437
58	33860
59	10064
60	832

[1, 1, 1, 1, 1, 2, 3, 2, 1, 2, 5, 9, 11, 7, 3, 3, 10, 26, 40, 40, 21, 6, 5, 25, 77, 159, 217, 185, 85, 19, 9, 56, 222, 575, 1031, 1230, 920, 356, 50, 18, 139, 654, 2082, 4679, 7437, 7982, 5308, 1804, 204, 35, 338, 1902, 7244, 19983, 40139, 57771, 56437, 33860, 10064, 832]

cp's OEIS Frontend

A134819 Irregular triangle read by rows: the number of hydrocarbon structures that can be drawn with a given number of carbons and units of unsaturation.

Table of values

List of values