login

A347990 as a simple table

na(n)
01
14
212
336
492
5252
6628
71644
84052
910340
1025332
1163708
12155452
13387036
14941948
152328740
165657236
1713914596
1833757804
1982713164
20200467108
21489746916
221186060492
232891000036
246997192716
2517025058164
2641186981772
27100070851212
28242000513660
29587312389940

[1,4,12,36,92,252,628,1644,4052,10340,25332,63708,
 155452,387036,941948,2328740,5657236,13914596,
 33757804,82713164,200467108,489746916,1186060492,
 2891000036,6997192716,17025058164,41186981772,
 100070851212,242000513660,587312389940]