A063394 - cp's OEIS frontend

A063394 Border sum triangle, read by rows: Let T(n,0)=T(n,n)=1. In general T(n,m) is the sum of the elements (apart from T(n,m) itself) in the border of the rectangle with vertices T(0,0), T(n-m,0), T(n,m) and T(m,m).

n	a(n)
0	1
1	1
2	1
3	1
4	3
5	1
6	1
7	7
8	7
9	1
10	1
11	15
12	19
13	15
14	1
15	1
16	31
17	47
18	47
19	31
20	1
21	1
22	63
23	111
24	131
25	111
26	63
27	1
28	1
29	127
30	255
31	343
32	343
33	255
34	127
35	1
36	1
37	255
38	575
39	863
40	979
41	863
42	575
43	255
44	1
45	1
46	511
47	1279
48	2111
49	2655
50	2655
51	2111
52	1279
53	511
54	1
55	1
56	1023
57	2815
58	5055
59	6943
60	7683
61	6943
62	5055
63	2815
64	1023
65	1

[1, 1, 1, 1, 3, 1, 1, 7, 7, 1, 1, 15, 19, 15, 1, 1, 31, 47, 47, 31, 1, 1, 63, 111, 131, 111, 63, 1, 1, 127, 255, 343, 343, 255, 127, 1, 1, 255, 575, 863, 979, 863, 575, 255, 1, 1, 511, 1279, 2111, 2655, 2655, 2111, 1279, 511, 1, 1, 1023, 2815, 5055, 6943, 7683, 6943, 5055, 2815, 1023, 1]

cp's OEIS Frontend

A063394 Border sum triangle, read by rows: Let T(n,0)=T(n,n)=1. In general T(n,m) is the sum of the elements (apart from T(n,m) itself) in the border of the rectangle with vertices T(0,0), T(n-m,0), T(n,m) and T(m,m).

Table of values

List of values