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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”).

A281920 as a simple table

na(n)
11
254
371
481
5196
6424
7451
82394
99057
1051737
1152141
12104439
13227914
14228088
151019555
161096369
171202713
181687563
191954556
203332130
213652731
224177592
2331669012
2479937731
2581478913
26148341053
27168763202
28182573136
29342393476
30773367191
311450679282
322914657310
333282344153

[1,54,71,81,196,424,451,2394,9057,51737,52141,
 104439,227914,228088,1019555,1096369,1202713,
 1687563,1954556,3332130,3652731,4177592,31669012,
 79937731,81478913,148341053,168763202,182573136,
 342393476,773367191,1450679282,2914657310,
 3282344153]