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”).

A156609 as a simple table

na(n)
01
11
21
31
4-2
51
61
74
84
91
101
11-4
128
13-4
141
151
164
178
188
194
201
211
22-4
238
24-8
258
26-4
271
281
294
308
318
328
338
344
351
361
37-4
388
39-8
408
41-8
428
43-4
441
451
464
478
488
498
508
518
528
534
541
551
56-4
578
58-8
598
60-8
618
62-8
638
64-4
651

[1,1,1,1,-2,1,1,4,4,1,1,-4,8,-4,1,1,4,8,8,4,1,1,
 -4,8,-8,8,-4,1,1,4,8,8,8,8,4,1,1,-4,8,-8,8,-8,8,
 -4,1,1,4,8,8,8,8,8,8,4,1,1,-4,8,-8,8,-8,8,-8,8,-4,
 1]