A218391 - cp's OEIS frontend

A218391 Let k be the n-th odd composite, then a(n) is the smallest wx such that w + x = (k-1)/2, y + z = (k+1)/2, and wx = y*z.

n	a(n)
1	4
2	12
3	24
4	36
5	40
6	60
7	72
8	84
9	112
10	144
11	144
12	180
13	180
14	220
15	252
16	264
17	312
18	360
19	364
20	432
21	420
22	504
23	480
24	540
25	544
26	612
27	684
28	792
29	760
30	864
31	900
32	840
33	936
34	924
35	1080
36	1012
37	1104
38	1260
39	1260
40	1200
41	1300
42	1440
43	1404
44	1584
45	1512
46	1764
47	1624
48	1836
49	1740
50	1860

[4, 12, 24, 36, 40, 60, 72, 84, 112, 144, 144, 180, 180, 220, 252, 264, 312, 360, 364, 432, 420, 504, 480, 540, 544, 612, 684, 792, 760, 864, 900, 840, 936, 924, 1080, 1012, 1104, 1260, 1260, 1200, 1300, 1440, 1404, 1584, 1512, 1764, 1624, 1836, 1740, 1860]

cp's OEIS Frontend

A218391 Let k be the n-th odd composite, then a(n) is the smallest wx such that w + x = (k-1)/2, y + z = (k+1)/2, and wx = y*z.

Table of values

List of values

cp's OEIS Frontend

A218391 Let k be the n-th odd composite, then a(n) is the smallest w*x such that w + x = (k-1)/2, y + z = (k+1)/2, and w*x = y*z.

Table of values

List of values

A218391 Let k be the n-th odd composite, then a(n) is the smallest wx such that w + x = (k-1)/2, y + z = (k+1)/2, and wx = y*z.