A321769 - cp's OEIS frontend

A321769 Consider the tree of triples P(n, k) with n > 0 and 0 < k <= 3^(n-1), such that P(1, 1) = [3; 4; 5] and each triple t on some row branches to the triples At, Bt, C*t on the next row (with A = [1, -2, 2; 2, -1, 2; 2, -2, 3], B = [1, 2, 2; 2, 1, 2; 2, 2, 3] and C = [-1, 2, 2; -2, 1, 2; -2, 2, 3]); T(n, k) is the second component of P(n, k).

n	a(n)
1	4
2	12
3	20
4	8
5	24
6	48
7	28
8	80
9	120
10	36
11	56
12	72
13	12
14	40
15	88
16	60
17	208
18	304
19	84
20	168
21	224
22	44
23	176
24	336
25	180
26	456
27	696
28	220
29	288
30	360
31	52
32	140
33	252
34	120
35	252
36	396
37	136
38	132
39	156
40	16
41	60
42	140
43	104
44	396
45	572
46	152
47	340
48	460
49	96
50	468
51	884
52	464
53	1140
54	1748
55	560
56	700

[4, 12, 20, 8, 24, 48, 28, 80, 120, 36, 56, 72, 12, 40, 88, 60, 208, 304, 84, 168, 224, 44, 176, 336, 180, 456, 696, 220, 288, 360, 52, 140, 252, 120, 252, 396, 136, 132, 156, 16, 60, 140, 104, 396, 572, 152, 340, 460, 96, 468, 884, 464, 1140, 1748, 560, 700]

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