A289722 - cp's OEIS frontend

A289722 Irregular triangle read by rows: T(n,k) is the number of unordered pairs of nodes at distance k in the n-Apollonian network.

n	a(n)
1	6
2	15
3	6
4	42
5	72
6	6
7	123
8	522
9	258
10	366
11	2970
12	3894
13	396
14	1095
15	14838
16	37332
17	13680
18	216
19	3282
20	68736
21	278490
22	224928
23	24624
24	9843
25	303918
26	1779678
27	2517228
28	754704
29	22032
30	29526
31	1303938
32	10269150
33	22233096
34	13114656
35	1489104
36	7776

[6, 15, 6, 42, 72, 6, 123, 522, 258, 366, 2970, 3894, 396, 1095, 14838, 37332, 13680, 216, 3282, 68736, 278490, 224928, 24624, 9843, 303918, 1779678, 2517228, 754704, 22032, 29526, 1303938, 10269150, 22233096, 13114656, 1489104, 7776]

cp's OEIS Frontend

A289722 Irregular triangle read by rows: T(n,k) is the number of unordered pairs of nodes at distance k in the n-Apollonian network.

Table of values

List of values