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A151027 as a simple table

n a(n)
0 1
1 2
2 10
3 40
4 196
5 868
6 4296
7 19948
8 99144
9 470996
10 2346544
11 11302204
12 56384200
13 273994132
14 1367983448
15 6688214316
16 33408923728
17 164055354132
18 819743599992
19 4038463409468
20 20183298573400
21 99679703789508
22 498243515811936
23 2465452041200476
24 12324560752499896
25 61079384649652052
26 305349388057227336

[1,2,10,40,196,868,4296,19948,99144,470996,
 2346544,11302204,56384200,273994132,1367983448,
 6688214316,33408923728,164055354132,819743599992,
 4038463409468,20183298573400,99679703789508,
 498243515811936,2465452041200476,
 12324560752499896,61079384649652052,
 305349388057227336]

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Last modified October 16 15:51 EDT 2019. Contains 328101 sequences. (Running on oeis4.)