A241433 - OEIS

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A241433 as a simple table

n	a(n)
1	15
2	88
3	448
4	5915
5	45139
6	377314
7	4136727
8	34541924
9	418453966
10	4088141292
11	40962255699
12	430943324954
13	4031664281839

[15,88,448,5915,45139,377314,4136727,34541924, 418453966,4088141292,40962255699,430943324954, 4031664281839]