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A002663 as a simple table

n a(n)
0 0
1 0
2 0
3 0
4 1
5 6
6 22
7 64
8 163
9 382
10 848
11 1816
12 3797
13 7814
14 15914
15 32192
16 64839
17 130238
18 261156
19 523128
20 1047225
21 2095590
22 4192510
23 8386560
24 16774891
25 33551806
26 67105912
27 134214424
28 268431773
29 536866822
30 1073737298

[0,0,0,0,1,6,22,64,163,382,848,1816,3797,7814,
 15914,32192,64839,130238,261156,523128,1047225,
 2095590,4192510,8386560,16774891,33551806,
 67105912,134214424,268431773,536866822,1073737298]

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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)