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A018018 as a simple table

n a(n)
0 1
1 2
2 6
3 15
4 36
5 91
6 225
7 554
8 1368
9 3375
10 8323
11 20527
12 50625
13 124851
14 307911
15 759375
16 1872779
17 4618672
18 11390625
19 28091696
20 69280082
21 170859375
22 421375453
23 1039201231
24 2562890625
25 6320631804
26 15588018473
27 38443359375
28 94809477068
29 233820277107

[1,2,6,15,36,91,225,554,1368,3375,8323,20527,
 50625,124851,307911,759375,1872779,4618672,
 11390625,28091696,69280082,170859375,421375453,
 1039201231,2562890625,6320631804,15588018473,
 38443359375,94809477068,233820277107]

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Last modified March 29 04:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)