A342719 - cp's OEIS frontend

A342719 Array read by ascending antidiagonals: T(k, n) is the sum of the consecutive positive integers from 1 to (n - 1)*k placed along the perimeter of an n-th order perimeter-magic k-gon.

n	a(n)
3	21
4	36
5	45
6	55
7	78
8	78
9	78
10	120
11	136
12	120
13	105
14	171
15	210
16	210
17	171
18	136
19	231
20	300
21	325
22	300
23	231
24	171
25	300
26	406
27	465
28	465
29	406
30	300
31	210
32	378
33	528
34	630
35	666
36	630
37	528
38	378
39	253
40	465
41	666
42	820
43	903
44	903
45	820
46	666
47	465
48	300
49	561
50	820
51	1035
52	1176
53	1225
54	1176
55	1035
56	820
57	561

[21, 36, 45, 55, 78, 78, 78, 120, 136, 120, 105, 171, 210, 210, 171, 136, 231, 300, 325, 300, 231, 171, 300, 406, 465, 465, 406, 300, 210, 378, 528, 630, 666, 630, 528, 378, 253, 465, 666, 820, 903, 903, 820, 666, 465, 300, 561, 820, 1035, 1176, 1225, 1176, 1035, 820, 561]

cp's OEIS Frontend

A342719 Array read by ascending antidiagonals: T(k, n) is the sum of the consecutive positive integers from 1 to (n - 1)*k placed along the perimeter of an n-th order perimeter-magic k-gon.

Table of values

List of values