login

A002661 as a simple table

na(n)
11
22
33
45
510
618
735
863
9126
10231
11462
12858
131716
143218
156435
1612155
1724310
1846189
1992378
20176358
21352716
22676039
231352078
242600150
255200300
2610029150
2720058300
2838779380
2977558760
30150270098
31300540195
32583401555
331166803110
342268783825
354537567650

[1,2,3,5,10,18,35,63,126,231,462,858,1716,3218,
 6435,12155,24310,46189,92378,176358,352716,676039,
 1352078,2600150,5200300,10029150,20058300,
 38779380,77558760,150270098,300540195,583401555,
 1166803110,2268783825,4537567650]