A161219-OEIS公司

A161219号作为一个简单的表

n个	a（n）
1	4
2	6
三	8
4	12
5	16
6	28
7	40
8	72
9	120
10	216
11	376
12	704
13	1264
14	2364
15	4384
16	8232
17	15424
18	29204
19	55192
20	104976
21	199760
22	381492
23	729448
24	1398504
25	2684368
26	5162856
27	9942136
28	19175160
29	37025584
30	71585136
31	138547336
32	268439592
33	520602352
34	1010588256
35	1963413664
36	3817763800

[4,6,8,12,16,28,40,72,120,216,376,704,1264,2364,4384,8232,15424,29204,55192,104976,199760,381492,729448,1398504,2684368,5162856,9942136,19175160,37025584,71585136,138547336,268439592,520602352,1010588256,1963413664,3817763800]