A131791 - cp's OEIS frontend

A131791 Triangle read by rows of 2^n terms for n>=0: let S(n) denote the initial 2^n terms of the partial sums of row n; starting with a single '1' in row 0, generate row n+1 by concatenating S(n) with the terms of S(n) when read in reverse order.

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	1
7	1
8	3
9	5
10	6
11	6
12	5
13	3
14	1
15	1
16	4
17	9
18	15
19	21
20	26
21	29
22	30
23	30
24	29
25	26
26	21
27	15
28	9
29	4
30	1
31	1
32	5
33	14
34	29
35	50
36	76
37	105
38	135
39	165
40	194
41	220
42	241
43	256
44	265
45	269
46	270
47	270
48	269
49	265
50	256
51	241
52	220
53	194
54	165
55	135
56	105
57	76
58	50
59	29
60	14
61	5
62	1
63	1
64	6
65	20
66	49
67	99
68	175
69	280
70	415

[1, 1, 1, 1, 2, 2, 1, 1, 3, 5, 6, 6, 5, 3, 1, 1, 4, 9, 15, 21, 26, 29, 30, 30, 29, 26, 21, 15, 9, 4, 1, 1, 5, 14, 29, 50, 76, 105, 135, 165, 194, 220, 241, 256, 265, 269, 270, 270, 269, 265, 256, 241, 220, 194, 165, 135, 105, 76, 50, 29, 14, 5, 1, 1, 6, 20, 49, 99, 175, 280, 415]

cp's OEIS Frontend

A131791 Triangle read by rows of 2^n terms for n>=0: let S(n) denote the initial 2^n terms of the partial sums of row n; starting with a single '1' in row 0, generate row n+1 by concatenating S(n) with the terms of S(n) when read in reverse order.

Table of values

List of values

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	1
7	1
8	3
9	5
10	6
11	6
12	5
13	3
14	1
15	1
16	4
17	9
18	15
19	21
20	26
21	29
22	30
23	30
24	29
25	26
26	21
27	15
28	9
29	4
30	1
31	1
32	5
33	14
34	29
35	50
36	76
37	105
38	135
39	165
40	194
41	220
42	241
43	256
44	265
45	269
46	270
47	270
48	269
49	265
50	256
51	241
52	220
53	194
54	165
55	135
56	105
57	76
58	50
59	29
60	14
61	5
62	1
63	1
64	6
65	20
66	49
67	99
68	175
69	280
70	415

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	1
7	1
8	3
9	5
10	6
11	6
12	5
13	3
14	1
15	1
16	4
17	9
18	15
19	21
20	26
21	29
22	30
23	30
24	29
25	26
26	21
27	15
28	9
29	4
30	1
31	1
32	5
33	14
34	29
35	50
36	76
37	105
38	135
39	165
40	194
41	220
42	241
43	256
44	265
45	269
46	270
47	270
48	269
49	265
50	256
51	241
52	220
53	194
54	165
55	135
56	105
57	76
58	50
59	29
60	14
61	5
62	1
63	1
64	6
65	20
66	49
67	99
68	175
69	280
70	415

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	1
7	1
8	3
9	5
10	6
11	6
12	5
13	3
14	1
15	1
16	4
17	9
18	15
19	21
20	26
21	29
22	30
23	30
24	29
25	26
26	21
27	15
28	9
29	4
30	1
31	1
32	5
33	14
34	29
35	50
36	76
37	105
38	135
39	165
40	194
41	220
42	241
43	256
44	265
45	269
46	270
47	270
48	269
49	265
50	256
51	241
52	220
53	194
54	165
55	135
56	105
57	76
58	50
59	29
60	14
61	5
62	1
63	1
64	6
65	20
66	49
67	99
68	175
69	280
70	415