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”).

A120557 as a simple table

na(n)
01
12
20
32
44
50
68
76
82
922
106
1116
1248
132
1454
1598
16-8
17168
18146
1914
20378
21294
2212
23936
24232
25594
261360
271242
28144
294152
3096
315558
32-220
3312614
34-6960
3525064
36-10004
3745842
38-54824
39141530
40-146162
41258080
42-282294
43584998
44-917064
451705678

[1,2,0,2,4,0,8,6,2,22,6,16,48,2,54,98,-8,168,146,
 14,378,294,12,936,232,594,1360,1242,144,4152,96,
 5558,-220,12614,-6960,25064,-10004,45842,-54824,
 141530,-146162,258080,-282294,584998,-917064,
 1705678]