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”).

A116466 as a simple table

na(n)
01
12
22
34
42
54
64
78
810
920
1032
1164
12112
13224
14408
15816
161514
173028
185680
1911360
2021472
2142944
2281644
23163288
24311896
25623792
261196132
272392264
284602236
299204472
3017757184
3135514368
3268680170
33137360340
34266200112
35532400224
361033703056

[1,2,2,4,2,4,4,8,10,20,32,64,112,224,408,816,1514,
 3028,5680,11360,21472,42944,81644,163288,311896,
 623792,1196132,2392264,4602236,9204472,17757184,
 35514368,68680170,137360340,266200112,532400224,
 1033703056]