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A153338 as a simple table

n a(n)
1 0
2 2
3 18
4 116
5 650
6 3372
7 16660
8 79592
9 371034
10 1697660
11 7654460
12 34106712
13 150499908
14 658707896
15 2863150440
16 12371226064
17 53178791162
18 227561427612
19 969890051884
20 4119092850680
21 17438036501676
22 73611934643368
23 309935825654168
24 1301878616066736

[0,2,18,116,650,3372,16660,79592,371034,1697660,
 7654460,34106712,150499908,658707896,2863150440,
 12371226064,53178791162,227561427612,969890051884,
 4119092850680,17438036501676,73611934643368,
 309935825654168,1301878616066736]

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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)