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A023005 as a simple table

n a(n)
0 1
1 6
2 27
3 98
4 315
5 918
6 2492
7 6372
8 15525
9 36280
10 81816
11 178794
12 380051
13 788004
14 1597725
15 3174210
16 6190182
17 11867310
18 22395359
19 41650050
20 76413078
21 138421358
22 247783113
23 438616728
24 768291650
25 1332444330
26 2289213495
27 3898064226
28 6581591157
29 11023247880

[1,6,27,98,315,918,2492,6372,15525,36280,81816,
 178794,380051,788004,1597725,3174210,6190182,
 11867310,22395359,41650050,76413078,138421358,
 247783113,438616728,768291650,1332444330,
 2289213495,3898064226,6581591157,11023247880]

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Last modified August 3 00:25 EDT 2021. Contains 346429 sequences. (Running on oeis4.)