login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

A261968 as a simple table

na(n)
01
1-2
24
3-8
414
5-22
636
7-56
884
9-126
10184
11-264
12376
13-528
14732
15-1008
161374
17-1856
182492
19-3320
204394
21-5784
227568
23-9848
2412756
25-16442
2621096
27-26960
2834312
29-43500
3054956
31-69184
3286804
33-108576
34135392
35-168336
36208722
37-258096
38318320
39-391632

[1,-2,4,-8,14,-22,36,-56,84,-126,184,-264,376,
 -528,732,-1008,1374,-1856,2492,-3320,4394,-5784,
 7568,-9848,12756,-16442,21096,-26960,34312,-43500,
 54956,-69184,86804,-108576,135392,-168336,208722,
 -258096,318320,-391632]