A393681 - OEIS

A393681 as a simple table

n	a(n)
0	2
1	4
2	8
3	13
4	20
5	29
6	40
7	52
8	66
9	81
10	98
11	117
12	138
13	160
14	184
15	209
16	236
17	265
18	296
19	328
20	362
21	397
22	434
23	473
24	514
25	556
26	600
27	645
28	692
29	741
30	792
31	844
32	898
33	953
34	1010
35	1069
36	1130
37	1192
38	1256
39	1321
40	1388
41	1457
42	1528
43	1600
44	1674
45	1749
46	1826
47	1905
48	1986
49	2068
50	2152

[2,4,8,13,20,29,40,52,66,81,98,117,138,160,184, 209,236,265,296,328,362,397,434,473,514,556,600, 645,692,741,792,844,898,953,1010,1069,1130,1192, 1256,1321,1388,1457,1528,1600,1674,1749,1826,1905, 1986,2068,2152]