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A250872 as a simple table

n a(n)
1 678
2 3442
3 16262
4 73122
5 317878
6 1350002
7 5640102
8 23289922
9 95366678
10 388124562
11 1572545542
12 6350471522
13 25583049078
14 102876275122
15 413138516582
16 1657456673922
17 6644539237078
18 26622304009682
19 106621676097222

[678,3442,16262,73122,317878,1350002,5640102,
 23289922,95366678,388124562,1572545542,6350471522,
 25583049078,102876275122,413138516582,
 1657456673922,6644539237078,26622304009682,
 106621676097222]

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Last modified December 7 17:25 EST 2022. Contains 358668 sequences. (Running on oeis4.)