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A140806 as a simple table

na(n)
11
21
31
41
51
61
71
81
9-15
10-15
11-15
12-15
13209
14209
15209
16209
17-2911
18-2911
19-2911
20-2911
2140545
2240545
2340545
2440545
25-564719
26-564719
27-564719
28-564719
297865521
307865521
317865521
327865521
33-109552575
34-109552575
35-109552575
36-109552575
371525870529
381525870529
391525870529

[1,1,1,1,1,1,1,1,-15,-15,-15,-15,209,209,209,209,
 -2911,-2911,-2911,-2911,40545,40545,40545,40545,
 -564719,-564719,-564719,-564719,7865521,7865521,
 7865521,7865521,-109552575,-109552575,-109552575,
 -109552575,1525870529,1525870529,1525870529]