login

A033440 as a simple table

na(n)
00
10
21
33
46
510
615
721
828
935
1043
1152
1262
1373
1485
1598
16112
17126
18141
19157
20174
21192
22211
23231
24252
25273
26295
27318
28342
29367
30393
31420
32448
33476
34505
35535
36566
37598
38631
39665
40700
41735
42771
43808
44846
45885
46925

[0,0,1,3,6,10,15,21,28,35,43,52,62,73,85,98,112,
 126,141,157,174,192,211,231,252,273,295,318,342,
 367,393,420,448,476,505,535,566,598,631,665,700,
 735,771,808,846,885,925]