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”).

A171715 as a simple table

na(n)
11
22
32
42
58
68
72
814
914
1014
118
1214
1314
148
1520
1626
1720
1820
1914
2014
2120
2220
2320
2426
252
268
2732
2826
2926
3044
3144
3250
3344
3438
3550
3626
3726
3838
3926
4032
4132
4220
4326
4420
4538
4638
4756
4862
4956
5068
5168
5280
5350
5450
5550
5644
5750
5862
5956
6050
6162
6274
6374
6462
6568
6656
6750
6844
6950
7050
7132
7244
7338

[1,2,2,2,8,8,2,14,14,14,8,14,14,8,20,26,20,20,14,
 14,20,20,20,26,2,8,32,26,26,44,44,50,44,38,50,26,
 26,38,26,32,32,20,26,20,38,38,56,62,56,68,68,80,
 50,50,50,44,50,62,56,50,62,74,74,62,68,56,50,44,
 50,50,32,44,38]