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A233828 as a simple table

n a(n)
0 -1
1 1
2 1
3 3
4 9
5 25
6 71
7 201
8 569
9 1611
10 4561
11 12913
12 36559
13 103505
14 293041
15 829651
16 2348889
17 6650121
18 18827671
19 53304473
20 150914409
21 427265435
22 1209664161
23 3424773601
24 9696140959
25 27451493281
26 77720042081
27 220039211683
28 622970000809
29 1763738467065

[-1,1,1,3,9,25,71,201,569,1611,4561,12913,36559,
 103505,293041,829651,2348889,6650121,18827671,
 53304473,150914409,427265435,1209664161,
 3424773601,9696140959,27451493281,77720042081,
 220039211683,622970000809,1763738467065]

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)