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A240251 as a simple table

n a(n)
1 6
2 0
3 8
4 40
5 152
6 540
7 1578
8 5912
9 18528
10 65302
11 212372
12 733426
13 2426106
14 8296612
15 27678444
16 94137686
17 315632340
18 1069956004
19 3597752554
20 12172795856
21 40997298324
22 138562059118
23 467091216442
24 1577693637918
25 5321097135168

[6,0,8,40,152,540,1578,5912,18528,65302,212372,
 733426,2426106,8296612,27678444,94137686,
 315632340,1069956004,3597752554,12172795856,
 40997298324,138562059118,467091216442,
 1577693637918,5321097135168]

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Last modified June 21 21:50 EDT 2024. Contains 373559 sequences. (Running on oeis4.)