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A303686 as a simple table

n a(n)
1 0
2 18
3 20
4 138
5 343
6 1744
7 5563
8 23963
9 85439
10 343499
11 1279385
12 5002512
13 18966028
14 73327791
15 280007343
16 1077678731
17 4127070788
18 15855095931
19 60788926535
20 233363355500
21 895138948721
22 3435345789704
23 13179822216490
24 50575246236646

[0,18,20,138,343,1744,5563,23963,85439,343499,
 1279385,5002512,18966028,73327791,280007343,
 1077678731,4127070788,15855095931,60788926535,
 233363355500,895138948721,3435345789704,
 13179822216490,50575246236646]

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Last modified April 17 23:23 EDT 2024. Contains 371767 sequences. (Running on oeis4.)