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A120920 as a simple table

n a(n)
0 1
1 3
2 12
3 55
4 276
5 1464
6 8058
7 45543
8 262626
9 1538607
10 9130446
11 54761628
12 331403447
13 2021021082
14 12407102937
15 76611488305
16 475493441604
17 2964664310319
18 18560063203353
19 116621922800283
20 735236268006654

[1,3,12,55,276,1464,8058,45543,262626,1538607,
 9130446,54761628,331403447,2021021082,12407102937,
 76611488305,475493441604,2964664310319,
 18560063203353,116621922800283,735236268006654]

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Last modified April 25 06:49 EDT 2024. Contains 371964 sequences. (Running on oeis4.)