login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A199833 as a simple table

na(n)
14
240
3140
4336
5660
61144
71820
82720
93876
105320
117084
129200
1311700
1414616
1517980
1621824
1726180
1831080
1936556
2042640
2149364
2256760
2364860
2473696
2583300
2693704
27104940
28117040
29130036
30143960
31158844
32174720
33191620
34209576
35228620
36248784

[4,40,140,336,660,1144,1820,2720,3876,5320,7084,
 9200,11700,14616,17980,21824,26180,31080,36556,
 42640,49364,56760,64860,73696,83300,93704,104940,
 117040,130036,143960,158844,174720,191620,209576,
 228620,248784]