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”).

A024780 as a simple table

na(n)
12
23
312
423
532
643
7232
8243
9412
10423
112232
124412
134423
1422232
15222232

[2,3,12,23,32,43,232,243,412,423,2232,4412,4423,
 22232,222232]