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A279840 as a simple table

n a(n)
0 1
1 1
2 1
3 3
4 9
5 33
6 153
7 723
8 4209
9 25377
10 172689
11 1269699
12 9918009
13 84824577
14 755458281
15 7273792467
16 73106578017
17 778521070017
18 8706817538721
19 101639490754563
20 1247219636693481
21 15865740131343201
22 211222989431067321
23 2910911923076727123
24 41712768080815125969
25 618850476497056820193
26 9493258647299740012593
27 150683229897137204994243
28 2464182867193114878735129
29 41617827328955209795843137
30 722857076727380399275752969

[1,1,1,3,9,33,153,723,4209,25377,172689,1269699,
 9918009,84824577,755458281,7273792467,73106578017,
 778521070017,8706817538721,101639490754563,
 1247219636693481,15865740131343201,
 211222989431067321,2910911923076727123,
 41712768080815125969,618850476497056820193,
 9493258647299740012593,150683229897137204994243,
 2464182867193114878735129,
 41617827328955209795843137,
 722857076727380399275752969]

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Last modified April 18 22:18 EDT 2024. Contains 371782 sequences. (Running on oeis4.)