A132274 - cp's OEIS frontend

A132274 a(1)=1; a(n+1) = Sum_{k=1..n} (k-th integer from among those positive integers which are coprime to a(n+1-k)).

n	a(n)
1	1
2	1
3	3
4	6
5	10
6	19
7	27
8	41
9	51
10	66
11	78
12	101
13	119
14	145
15	167
16	197
17	219
18	247
19	272
20	306
21	335
22	371
23	403
24	443
25	477
26	521
27	559
28	609
29	647
30	693
31	737
32	789
33	834
34	886
35	940
36	996
37	1055
38	1118
39	1176
40	1243
41	1306
42	1385
43	1450
44	1523
45	1596
46	1676
47	1749
48	1844
49	1914
50	2010
51	2092
52	2188

[1, 1, 3, 6, 10, 19, 27, 41, 51, 66, 78, 101, 119, 145, 167, 197, 219, 247, 272, 306, 335, 371, 403, 443, 477, 521, 559, 609, 647, 693, 737, 789, 834, 886, 940, 996, 1055, 1118, 1176, 1243, 1306, 1385, 1450, 1523, 1596, 1676, 1749, 1844, 1914, 2010, 2092, 2188]

cp's OEIS Frontend

A132274 a(1)=1; a(n+1) = Sum_{k=1..n} (k-th integer from among those positive integers which are coprime to a(n+1-k)).

Table of values

List of values