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A087193 as a simple table

n a(n)
1 3
2 9
3 156
4 3431
5 2280921
6 64092034
7 55747783602
8 1700642242677
9 1657887524047959
10 54732141299289779730
11 1783584256683646551447
12 63884853139612229737722392
13 71016623651822742997810429944
14 2380864745882038026563515929162
15 2701273375177028344436110369387929

[3,9,156,3431,2280921,64092034,55747783602,
 1700642242677,1657887524047959,
 54732141299289779730,1783584256683646551447,
 63884853139612229737722392,
 71016623651822742997810429944,
 2380864745882038026563515929162,
 2701273375177028344436110369387929]

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Last modified February 24 02:58 EST 2024. Contains 370288 sequences. (Running on oeis4.)