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A120718 as a simple table

n a(n)
0 0
1 3
2 6
3 18
4 45
5 120
6 312
7 819
8 2142
9 5610
10 14685
11 38448
12 100656
13 263523
14 689910
15 1806210
16 4728717
17 12379944
18 32411112
19 84853395
20 222149070
21 581593818
22 1522632381
23 3986303328
24 10436277600
25 27322529475
26 71531310822
27 187271402994
28 490282898157
29 1283577291480

[0,3,6,18,45,120,312,819,2142,5610,14685,38448,
 100656,263523,689910,1806210,4728717,12379944,
 32411112,84853395,222149070,581593818,1522632381,
 3986303328,10436277600,27322529475,71531310822,
 187271402994,490282898157,1283577291480]

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Last modified April 18 22:18 EDT 2024. Contains 371782 sequences. (Running on oeis4.)