A049983 - OEIS

A049983 as a simple table

n	a(n)
1	0
2	0
3	1
4	2
5	4
6	7
7	10
8	13
9	19
10	24
11	29
12	37
13	43
14	50
15	62
16	70
17	78
18	92
19	101
20	112
21	129
22	141
23	152
24	171
25	185
26	199
27	221
28	237
29	251
30	278
31	293
32	310
33	337
34	356
35	377
36	409
37	427
38	448
39	480
40	505
41	525
42	563
43	584
44	609
45	651
46	677
47	700
48	742
49	768
50	800
51	843
52	873
53	899
54	948
55	981
56	1014
57	1062
58	1095
59	1124
60	1183
61	1213
62	1248
63	1304
64	1341
65	1380

[0,0,1,2,4,7,10,13,19,24,29,37,43,50,62,70,78,92, 101,112,129,141,152,171,185,199,221,237,251,278, 293,310,337,356,377,409,427,448,480,505,525,563, 584,609,651,677,700,742,768,800,843,873,899,948, 981,1014,1062,1095,1124,1183,1213,1248,1304,1341, 1380]