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”).

A157783 as a simple table

na(n)
01
11
2-1
33
4-4
51
627
7-39
813
9-1
10729
11-1080
12390
13-40
141
1559049
16-88209
1732670
18-3630
19121
20-1
2114348907
22-21493836
238027019
24-914760
2533033
26-364
271
2810460353203
29-15683355351
305873190687
31-674887059
3224995817
33-298389
341093

[1,1,-1,3,-4,1,27,-39,13,-1,729,-1080,390,-40,1,
 59049,-88209,32670,-3630,121,-1,14348907,
 -21493836,8027019,-914760,33033,-364,1,
 10460353203,-15683355351,5873190687,-674887059,
 24995817,-298389,1093]