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A019259 as a simple table

n a(n)
3 0
4 1
5 4
6 0
7 0
8 16
9 24
10 82
11 240
12 506
13 1200
14 2784
15 6358
16 15838
17 40206
18 102520
19 265314
20 682404
21 1743868
22 4471246
23 11502628
24 29694976
25 77032860
26 200484130
27 522866760
28 1366739182
29 3579462164
30 9390919826
31 24686549192

[0,1,4,0,0,16,24,82,240,506,1200,2784,6358,15838,
 40206,102520,265314,682404,1743868,4471246,
 11502628,29694976,77032860,200484130,522866760,
 1366739182,3579462164,9390919826,24686549192]

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)