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A326660 as a simple table

n a(n)
1 0
2 0
3 1
4 3
5 12
6 34
7 111
8 315
9 933
10 2622
11 7503
12 21033
13 59472
14 167118
15 472120
16 1332945
17 3777600
18 10720869
19 30516447
20 87032994
21 248820704
22 712743768
23 2045784183
24 5882367570
25 16942974048
26 48876558318
27 141204944529
28 408494941773
29 1183247473872
30 3431450670601

[0,0,1,3,12,34,111,315,933,2622,7503,21033,59472,
 167118,472120,1332945,3777600,10720869,30516447,
 87032994,248820704,712743768,2045784183,
 5882367570,16942974048,48876558318,141204944529,
 408494941773,1183247473872,3431450670601]

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Last modified June 11 19:50 EDT 2024. Contains 373317 sequences. (Running on oeis4.)