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”).

A293376 as a simple table

na(n)
11
21
39
416
59
625
7288
849
9972
10121
1141472
12169
13101250
14289
151119744
16361
17320000
18388962
19529
201062882
211229312
22841
233888000000
24961
252371842
263001250
2711609505792
281369
294626882
30327680000
311681
3229274835968
331849
347496192
3544286750000
362209
3765229815808

[1,1,9,16,9,25,288,49,972,121,41472,169,101250,
 289,1119744,361,320000,388962,529,1062882,1229312,
 841,3888000000,961,2371842,3001250,11609505792,
 1369,4626882,327680000,1681,29274835968,1849,
 7496192,44286750000,2209,65229815808]