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”).

A022184 as a simple table

na(n)
01
11
21
31
421
51
61
7421
8421
91
101
118421
12168821
138421
141
151
16168421
1767536821
1867536821
19168421
201
211
223368421
2327014896821
24540362104821
2527014896821
263368421
271
281
2967368421
3010805962096821
314322923853464821

[1,1,1,1,21,1,1,421,421,1,1,8421,168821,8421,1,1,
 168421,67536821,67536821,168421,1,1,3368421,
 27014896821,540362104821,27014896821,3368421,1,1,
 67368421,10805962096821,4322923853464821]