A009918 - OEIS

A009918 as a simple table

n	a(n)
0	1
1	4
2	8
3	18
4	32
5	52
6	70
7	98
8	132
9	152
10	200
11	242
12	286
13	324
14	404
15	422
16	520
17	564
18	646
19	690
20	828
21	820
22	988
23	1026
24	1154
25	1188
26	1400
27	1354
28	1608
29	1620
30	1806
31	1826
32	2124
33	2016
34	2376
35	2354
36	2606
37	2596
38	2996
39	2814
40	3296
41	3220
42	3550
43	3506
44	4020
45	3740
46	4364
47	4226

[1,4,8,18,32,52,70,98,132,152,200,242,286,324,404, 422,520,564,646,690,828,820,988,1026,1154,1188, 1400,1354,1608,1620,1806,1826,2124,2016,2376,2354, 2606,2596,2996,2814,3296,3220,3550,3506,4020,3740, 4364,4226]