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”).

A187719 as a simple table

na(n)
11
221
371
41179
52429
647571
71296179
88703821
926452429
10526452429
1113241296179
1219473547571
132263241296179
142480526452429
1567263241296179
16932736758703821
174067263241296179
1838602480526452429
19461397519473547571

[1,21,71,1179,2429,47571,1296179,8703821,26452429,
 526452429,13241296179,19473547571,2263241296179,
 2480526452429,67263241296179,932736758703821,
 4067263241296179,38602480526452429,
 461397519473547571]