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A168187 as a simple table

n a(n)
0 0
1 1
2 260
3 9855
4 131104
5 976625
6 5038956
7 20176975
8 67109120
9 193710609
10 500000500
11 1178974511
12 2579891040
13 5302250785
14 10330524764
15 19221681375
16 34359740416
17 59293940705
18 99179648100
19 161343852319
20 256000004000

[0,1,260,9855,131104,976625,5038956,20176975,
 67109120,193710609,500000500,1178974511,
 2579891040,5302250785,10330524764,19221681375,
 34359740416,59293940705,99179648100,161343852319,
 256000004000]

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Last modified March 5 03:04 EST 2024. Contains 370537 sequences. (Running on oeis4.)