A323940 - cp's OEIS frontend

A323940 Number of nonisomorphic systems (isomers) for the unsymmetrical schemes (group C_s) for unbranched tri-4-catafusenes as a function of the number of hexagons (see Cyvin et al. (1996) for precise definition).

n	a(n)
3	0
4	1
5	8
6	52
7	244
8	1093
9	4490
10	17952
11	69304
12	262385
13	973916
14	3562532
15	12856716
16	45880933
17	162085694
18	567578784
19	1971766704
20	6801381633
21	23309759728
22	79421199860
23	269160256356
24	907726205221
25	3047449152562
26	10188384019072
27	33930769372904

[0, 1, 8, 52, 244, 1093, 4490, 17952, 69304, 262385, 973916, 3562532, 12856716, 45880933, 162085694, 567578784, 1971766704, 6801381633, 23309759728, 79421199860, 269160256356, 907726205221, 3047449152562, 10188384019072, 33930769372904]

cp's OEIS Frontend

A323940 Number of nonisomorphic systems (isomers) for the unsymmetrical schemes (group C_s) for unbranched tri-4-catafusenes as a function of the number of hexagons (see Cyvin et al. (1996) for precise definition).

Table of values

List of values