A013921 - OEIS

A013921 as a simple table

n	a(n)
1	4
2	10
3	18
4	27
5	49
6	63
7	78
8	94
9	112
10	132
11	153
12	175
13	224
14	250
15	305
16	335
17	400
18	434
19	469
20	505
21	543
22	582
23	622
24	664
25	708
26	753
27	799
28	847
29	896
30	946
31	1158
32	1214
33	1271
34	1329
35	1389
36	1514
37	1578
38	1643
39	1846
40	1916
41	1988
42	2062
43	2290
44	2368
45	2448
46	2529
47	2611
48	2695
49	2780
50	2866

[4,10,18,27,49,63,78,94,112,132,153,175,224,250, 305,335,400,434,469,505,543,582,622,664,708,753, 799,847,896,946,1158,1214,1271,1329,1389,1514, 1578,1643,1846,1916,1988,2062,2290,2368,2448,2529, 2611,2695,2780,2866]