A361827 - cp's OEIS frontend

A361827 For any number k >= 0, let T_k be the triangle whose base corresponds to the ternary expansion of k (without leading zeros) and other values, say t above u and v, satisfy t = (-u-v) mod 3; this sequence lists the numbers k such that the configurations of 0's, 1's and 2's in T_k are the same up to rotation.

n	a(n)
1	3
2	5
3	6
4	7
5	11
6	15
7	19
8	21
9	84
10	93
11	102
12	140
13	149
14	158
15	168
16	177
17	186
18	196
19	205
20	214
21	308
22	318
23	351
24	377
25	410
26	420
27	528
28	532
29	574
30	588
31	702
32	715
33	2271
34	2396
35	2523
36	2621
37	2775
38	2873
39	2933
40	3150
41	3185
42	3375
43	3410
44	3627
45	3687
46	3785
47	3939
48	4037
49	4164
50	4289
51	4519

[3, 5, 6, 7, 11, 15, 19, 21, 84, 93, 102, 140, 149, 158, 168, 177, 186, 196, 205, 214, 308, 318, 351, 377, 410, 420, 528, 532, 574, 588, 702, 715, 2271, 2396, 2523, 2621, 2775, 2873, 2933, 3150, 3185, 3375, 3410, 3627, 3687, 3785, 3939, 4037, 4164, 4289, 4519]

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