A183808 - OEIS

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A183808 as a simple table

n	a(n)
1	243
2	4341
3	70044
4	1232595
5	20745787
6	360549804
7	6153770375
8	106324742825
9	1823862776230
10	31435034643715
11	540242027044863
12	9301932692926094
13	159977961165737219
14	2753396085474939071
15	47367137650822979126

[243,4341,70044,1232595,20745787,360549804, 6153770375,106324742825,1823862776230, 31435034643715,540242027044863,9301932692926094, 159977961165737219,2753396085474939071, 47367137650822979126]