A249406 - cp's OEIS frontend

A249406 Start with a(1) = 1, and extend by the rule that the next term is the product of the two most recent non-terms of the sequence.

n	a(n)
1	1
2	6
3	20
4	56
5	90
6	132
7	182
8	240
9	306
10	399
11	506
12	600
13	702
14	812
15	930
16	1056
17	1190
18	1332
19	1482
20	1640
21	1806
22	1980
23	2162
24	2352
25	2550
26	2756
27	2970
28	3306
29	3540
30	3782
31	4032
32	4290
33	4556
34	4830
35	5112
36	5402
37	5700
38	6006
39	6320
40	6642
41	6972
42	7310
43	7656
44	8099
45	8556
46	8930
47	9312

[1, 6, 20, 56, 90, 132, 182, 240, 306, 399, 506, 600, 702, 812, 930, 1056, 1190, 1332, 1482, 1640, 1806, 1980, 2162, 2352, 2550, 2756, 2970, 3306, 3540, 3782, 4032, 4290, 4556, 4830, 5112, 5402, 5700, 6006, 6320, 6642, 6972, 7310, 7656, 8099, 8556, 8930, 9312]

cp's OEIS Frontend

A249406 Start with a(1) = 1, and extend by the rule that the next term is the product of the two most recent non-terms of the sequence.

Table of values

List of values