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A265987 as a simple table

n a(n)
1 2
2 2
3 6
4 10
5 30
6 66
7 182
8 442
9 1166
10 2930
11 7590
12 19306
13 49662
14 126882
15 325526
16 833050
17 2135150
18 5467346
19 14007942
20 35877322
21 91909086
22 235418370
23 603054710
24 1544728186
25 3956947022
26 10135859762
27 25963647846
28 66507086890
29 170361678270

[2,2,6,10,30,66,182,442,1166,2930,7590,19306,
 49662,126882,325526,833050,2135150,5467346,
 14007942,35877322,91909086,235418370,603054710,
 1544728186,3956947022,10135859762,25963647846,
 66507086890,170361678270]

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Last modified March 28 07:33 EDT 2024. Contains 371235 sequences. (Running on oeis4.)