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A340357 as a simple table

n a(n)
0 1
1 3
2 7
3 20
4 64
5 232
6 908
7 3717
8 15716
9 67996
10 299396
11 1337022
12 6040421
13 27556567
14 126762966
15 587324586
16 2738338960
17 12837950292
18 60483207417
19 286206067039
20 1359678614745
21 6482510515788
22 31006901328525
23 148750651958227
24 715545729962692
25 3450638733403489

[1,3,7,20,64,232,908,3717,15716,67996,299396,
 1337022,6040421,27556567,126762966,587324586,
 2738338960,12837950292,60483207417,286206067039,
 1359678614745,6482510515788,31006901328525,
 148750651958227,715545729962692,3450638733403489]

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Last modified January 27 17:42 EST 2023. Contains 359845 sequences. (Running on oeis4.)