A167051 - cp's OEIS frontend

A167051 Start at 1, then add the first term (which is one here) plus 1 for the second term; then add the second term plus 2 for the third term; then add the third term to the sum of the first and second term; this gives the fourth term. Restart the sequence by adding 1 to the fourth term, etc. (From a sixth grade math extra credit assignment).

n	a(n)
1	1
2	2
3	4
4	7
5	8
6	10
7	25
8	26
9	28
10	79
11	80
12	82
13	241
14	242
15	244
16	727
17	728
18	730
19	2185
20	2186
21	2188
22	6559
23	6560
24	6562
25	19681
26	19682
27	19684
28	59047
29	59048
30	59050
31	177145
32	177146
33	177148
34	531439
35	531440
36	531442
37	1594321
38	1594322
39	1594324
40	4782967
41	4782968
42	4782970
43	14348905

[1, 2, 4, 7, 8, 10, 25, 26, 28, 79, 80, 82, 241, 242, 244, 727, 728, 730, 2185, 2186, 2188, 6559, 6560, 6562, 19681, 19682, 19684, 59047, 59048, 59050, 177145, 177146, 177148, 531439, 531440, 531442, 1594321, 1594322, 1594324, 4782967, 4782968, 4782970, 14348905]

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