login

A001621 as a simple table

na(n)
00
12
212
342
4110
5240
6462
7812
81332
92070
103080
114422
126162
138372
1411130
1514520
1618632
1723562
1829412
1936290
2044310
2153592
2264262
2376452
2490300
25105950
26123552
27143262
28165242
29189660
30216690
31246512
32279312
33315282
34354620
35397530
36444222
37494912
38549822

[0,2,12,42,110,240,462,812,1332,2070,3080,4422,
 6162,8372,11130,14520,18632,23562,29412,36290,
 44310,53592,64262,76452,90300,105950,123552,
 143262,165242,189660,216690,246512,279312,315282,
 354620,397530,444222,494912,549822]