A009870 - OEIS

A009870 as a simple table

n	a(n)
0	1
1	4
2	10
3	21
4	32
5	47
6	74
7	105
8	134
9	159
10	196
11	250
12	298
13	340
14	384
15	445
16	525
17	592
18	653
19	725
20	803
21	888
22	976
23	1068
24	1156
25	1249
26	1358
27	1470
28	1588
29	1696
30	1801
31	1931
32	2064
33	2192
34	2322
35	2461
36	2612
37	2756
38	2904
39	3056
40	3214
41	3390
42	3553
43	3715
44	3885
45	4057
46	4260

[1,4,10,21,32,47,74,105,134,159,196,250,298,340, 384,445,525,592,653,725,803,888,976,1068,1156, 1249,1358,1470,1588,1696,1801,1931,2064,2192,2322, 2461,2612,2756,2904,3056,3214,3390,3553,3715,3885, 4057,4260]