A319070 - cp's OEIS frontend

A319070 a(n) is the area of the surface made of the rectangles with vertices (d, n/d), (D, n/d), (D, n/D), (d, n/D) for all (d, D), pair of consecutive divisors of n.

n	a(n)
1	0
2	1
3	4
4	4
5	16
6	7
7	36
8	12
9	24
10	19
11	100
12	17
13	144
14	39
15	44
16	32
17	256
18	33
19	324
20	41
21	72
22	103
23	484
24	40
25	160
26	147
27	108
28	65
29	784
30	57
31	900
32	80
33	152
34	259
35	228
36	66
37	1296
38	327
39	204
40	93
41	1600
42	99
43	1764
44	137
45	160
46	487
47	2116
48	92
49	504
50	165
51	332
52	185
53	2704
54	135
55	388

[0, 1, 4, 4, 16, 7, 36, 12, 24, 19, 100, 17, 144, 39, 44, 32, 256, 33, 324, 41, 72, 103, 484, 40, 160, 147, 108, 65, 784, 57, 900, 80, 152, 259, 228, 66, 1296, 327, 204, 93, 1600, 99, 1764, 137, 160, 487, 2116, 92, 504, 165, 332, 185, 2704, 135, 388]

cp's OEIS Frontend

A319070 a(n) is the area of the surface made of the rectangles with vertices (d, n/d), (D, n/d), (D, n/D), (d, n/D) for all (d, D), pair of consecutive divisors of n.

Table of values

List of values