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A275965 as a simple table

n a(n)
1 1
2 4
3 18
4 216
5 1794
6 16050
7 161748
8 1754886
9 20252058
10 257046648
11 9715067802
12 169069882650
13 3334258948644
14 65130972856014
15 1314162130657122
16 27756075741907992
17 599859130159322082
18 13631049605170919850
19 318062816759187443364
20 7775218520916136276470
21 195524294317191054759258
22 5132224614520884668600904
23 139264442985628101392954898

[1,4,18,216,1794,16050,161748,1754886,20252058,
 257046648,9715067802,169069882650,3334258948644,
 65130972856014,1314162130657122,27756075741907992,
 599859130159322082,13631049605170919850,
 318062816759187443364,7775218520916136276470,
 195524294317191054759258,
 5132224614520884668600904,
 139264442985628101392954898]

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Last modified April 24 00:30 EDT 2024. Contains 371917 sequences. (Running on oeis4.)