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A217278 as a simple table

n a(n)
0 0
1 0
2 1
3 3
4 10
5 15
6 45
7 120
8 351
9 528
10 1540
11 4095
12 11935
13 17955
14 52326
15 139128
16 405450
17 609960
18 1777555
19 4726275
20 13773376
21 20720703
22 60384555
23 160554240
24 467889345
25 703893960
26 2051297326
27 5454117903
28 15894464365
29 23911673955
30 69683724540
31 185279454480

[0,0,1,3,10,15,45,120,351,528,1540,4095,11935,
 17955,52326,139128,405450,609960,1777555,4726275,
 13773376,20720703,60384555,160554240,467889345,
 703893960,2051297326,5454117903,15894464365,
 23911673955,69683724540,185279454480]

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