A297920 - OEIS

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A297920 as a simple table

n	a(n)
1	3
2	216
3	3276
4	41762
5	575754
6	7960069
7	109611795
8	1511726778
9	20851649928
10	287587925275
11	3966669463101
12	54712728879235
13	754657175634132
14	10409064835821411
15	143573509709029089
16	1980327271124061504

[3,216,3276,41762,575754,7960069,109611795, 1511726778,20851649928,287587925275,3966669463101, 54712728879235,754657175634132,10409064835821411, 143573509709029089,1980327271124061504]