A009921 - OEIS

A009921 as a simple table

n	a(n)
0	1
1	4
2	10
3	18
4	33
5	57
6	77
7	95
8	129
9	172
10	209
11	248
12	292
13	341
14	401
15	466
16	527
17	587
18	656
19	736
20	820
21	903
22	989
23	1079
24	1171
25	1273
26	1382
27	1487
28	1597
29	1718
30	1837
31	1955
32	2083
33	2223
34	2364
35	2499
36	2639
37	2785
38	2939
39	3104
40	3270
41	3428
42	3586
43	3763
44	3949
45	4134
46	4318

[1,4,10,18,33,57,77,95,129,172,209,248,292,341, 401,466,527,587,656,736,820,903,989,1079,1171, 1273,1382,1487,1597,1718,1837,1955,2083,2223,2364, 2499,2639,2785,2939,3104,3270,3428,3586,3763,3949, 4134,4318]