A178095 - cp's OEIS frontend

A178095 a(1)=a(2)=a(3)=1; thereafter a(n) = lpf(a(n-1)+a(n-2)+a(n-3)), where lpf = "least prime factor".

n	a(n)
1	1
2	1
3	1
4	3
5	5
6	3
7	11
8	19
9	3
10	3
11	5
12	11
13	19
14	5
15	5
16	29
17	3
18	37
19	3
20	43
21	83
22	3
23	3
24	89
25	5
26	97
27	191
28	293
29	7
30	491
31	7
32	5
33	503
34	5
35	3
36	7
37	3
38	13
39	23
40	3
41	3
42	29
43	5
44	37
45	71
46	113
47	13
48	197
49	17
50	227
51	3
52	13
53	3
54	19
55	5
56	3
57	3
58	11
59	17
60	31
61	59
62	107
63	197
64	3
65	307
66	3
67	313
68	7
69	17
70	337
71	19
72	373
73	3
74	5
75	3
76	11
77	19
78	3
79	3
80	5
81	11
82	19
83	5
84	5
85	29
86	3
87	37
88	3
89	43
90	83
91	3
92	3
93	89
94	5
95	97
96	191
97	293
98	7
99	491
100	7

[1, 1, 1, 3, 5, 3, 11, 19, 3, 3, 5, 11, 19, 5, 5, 29, 3, 37, 3, 43, 83, 3, 3, 89, 5, 97, 191, 293, 7, 491, 7, 5, 503, 5, 3, 7, 3, 13, 23, 3, 3, 29, 5, 37, 71, 113, 13, 197, 17, 227, 3, 13, 3, 19, 5, 3, 3, 11, 17, 31, 59, 107, 197, 3, 307, 3, 313, 7, 17, 337, 19, 373, 3, 5, 3, 11, 19, 3, 3, 5, 11, 19, 5, 5, 29, 3, 37, 3, 43, 83, 3, 3, 89, 5, 97, 191, 293, 7, 491, 7]

cp's OEIS Frontend

A178095 a(1)=a(2)=a(3)=1; thereafter a(n) = lpf(a(n-1)+a(n-2)+a(n-3)), where lpf = "least prime factor".

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	3
5	5
6	3
7	11
8	19
9	3
10	3
11	5
12	11
13	19
14	5
15	5
16	29
17	3
18	37
19	3
20	43
21	83
22	3
23	3
24	89
25	5
26	97
27	191
28	293
29	7
30	491
31	7
32	5
33	503
34	5
35	3
36	7
37	3
38	13
39	23
40	3
41	3
42	29
43	5
44	37
45	71
46	113
47	13
48	197
49	17
50	227
51	3
52	13
53	3
54	19
55	5
56	3
57	3
58	11
59	17
60	31
61	59
62	107
63	197
64	3
65	307
66	3
67	313
68	7
69	17
70	337
71	19
72	373
73	3
74	5
75	3
76	11
77	19
78	3
79	3
80	5
81	11
82	19
83	5
84	5
85	29
86	3
87	37
88	3
89	43
90	83
91	3
92	3
93	89
94	5
95	97
96	191
97	293
98	7
99	491
100	7

n	a(n)
1	1
2	1
3	1
4	3
5	5
6	3
7	11
8	19
9	3
10	3
11	5
12	11
13	19
14	5
15	5
16	29
17	3
18	37
19	3
20	43
21	83
22	3
23	3
24	89
25	5
26	97
27	191
28	293
29	7
30	491
31	7
32	5
33	503
34	5
35	3
36	7
37	3
38	13
39	23
40	3
41	3
42	29
43	5
44	37
45	71
46	113
47	13
48	197
49	17
50	227
51	3
52	13
53	3
54	19
55	5
56	3
57	3
58	11
59	17
60	31
61	59
62	107
63	197
64	3
65	307
66	3
67	313
68	7
69	17
70	337
71	19
72	373
73	3
74	5
75	3
76	11
77	19
78	3
79	3
80	5
81	11
82	19
83	5
84	5
85	29
86	3
87	37
88	3
89	43
90	83
91	3
92	3
93	89
94	5
95	97
96	191
97	293
98	7
99	491
100	7

n	a(n)
1	1
2	1
3	1
4	3
5	5
6	3
7	11
8	19
9	3
10	3
11	5
12	11
13	19
14	5
15	5
16	29
17	3
18	37
19	3
20	43
21	83
22	3
23	3
24	89
25	5
26	97
27	191
28	293
29	7
30	491
31	7
32	5
33	503
34	5
35	3
36	7
37	3
38	13
39	23
40	3
41	3
42	29
43	5
44	37
45	71
46	113
47	13
48	197
49	17
50	227
51	3
52	13
53	3
54	19
55	5
56	3
57	3
58	11
59	17
60	31
61	59
62	107
63	197
64	3
65	307
66	3
67	313
68	7
69	17
70	337
71	19
72	373
73	3
74	5
75	3
76	11
77	19
78	3
79	3
80	5
81	11
82	19
83	5
84	5
85	29
86	3
87	37
88	3
89	43
90	83
91	3
92	3
93	89
94	5
95	97
96	191
97	293
98	7
99	491
100	7