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”).

A231515 as a simple table

na(n)
12
22
32
44
56
64
77
814
914
107
1112
1235
1378
1435
1512
1621
1790
18343
19343
2090
2121
2237
23225
241537
252594
261537
27225
2837
2965
30569
317505
3219435
3319435
347505
35569
3665
37114
381441
3935872
40158061
41256846
42158061
4335872
441441
45114
46200
473640
48168887
491275558
503691558

[2,2,2,4,6,4,7,14,14,7,12,35,78,35,12,21,90,343,
 343,90,21,37,225,1537,2594,1537,225,37,65,569,
 7505,19435,19435,7505,569,65,114,1441,35872,
 158061,256846,158061,35872,1441,114,200,3640,
 168887,1275558,3691558]