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A018214 as a simple table

n a(n)
0 1
1 6
2 36
3 146
4 511
5 1512
6 4032
7 9752
8 21942
9 46252
10 92504
11 176484
12 323554
13 572264
14 981024
15 1634776
16 2656511
17 4218786
18 6562556
19 10016006
20 15024009
21 22177584
22 32258304
23 46282704
24 65567164
25 91792792
26 127097712
27 174169352

[1,6,36,146,511,1512,4032,9752,21942,46252,92504,
 176484,323554,572264,981024,1634776,2656511,
 4218786,6562556,10016006,15024009,22177584,
 32258304,46282704,65567164,91792792,127097712,
 174169352]

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)