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”).

A042261 as a simple table

na(n)
01
11
22
33
45
513
618
731
849
980
104049
114129
128178
1312307
1420485
1553277
1673762
17127039
18200801
19327840
2016592801
2116920641
2233513442
2350434083
2483947525
25218329133
26302276658
27520605791
28822882449
291343488240
3067997294449
3169340782689
32137338077138

[1,1,2,3,5,13,18,31,49,80,4049,4129,8178,12307,
 20485,53277,73762,127039,200801,327840,16592801,
 16920641,33513442,50434083,83947525,218329133,
 302276658,520605791,822882449,1343488240,
 67997294449,69340782689,137338077138]