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A215186 as a simple table

n a(n)
1 2
2 48
3 328
4 3216
5 18940
6 102958
7 437416
8 1745476
9 6074164
10 19546414
11 57274236
12 158706286
13 408770608
14 1005752468
15 2347176012
16 5262852883
17 11312035800
18 23548549548
19 47322841540
20 92544936670
21 175876801036
22 326378292388 

[2,48,328,3216,18940,102958,437416,1745476,
 6074164,19546414,57274236,158706286,408770608,
 1005752468,2347176012,5262852883,11312035800,
 23548549548,47322841540,92544936670,175876801036,
 326378292388]

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Last modified June 10 09:13 EDT 2024. Contains 373259 sequences. (Running on oeis4.)