A086194 - cp's OEIS frontend

A086194 Number of unrooted steric quartic trees with n (unlabeled) nodes and possessing a centroid; number of n carbon alkanes C(n)H(2n +2) with a centroid when stereoisomers are regarded as different.

n	a(n)
1	1
2	0
3	1
4	1
5	3
6	2
7	11
8	9
9	55
10	70
11	345
12	494
13	2412
14	3788
15	18127
16	30799
17	143255
18	256353
19	1173770
20	2190163
21	9892302
22	19130814
23	85289390
24	169923748
25	749329719
26	1531701274
27	6688893605
28	13984116304
29	60526543480
30	129073842978

[1, 0, 1, 1, 3, 2, 11, 9, 55, 70, 345, 494, 2412, 3788, 18127, 30799, 143255, 256353, 1173770, 2190163, 9892302, 19130814, 85289390, 169923748, 749329719, 1531701274, 6688893605, 13984116304, 60526543480, 129073842978]

cp's OEIS Frontend

A086194 Number of unrooted steric quartic trees with n (unlabeled) nodes and possessing a centroid; number of n carbon alkanes C(n)H(2n +2) with a centroid when stereoisomers are regarded as different.

Table of values

List of values