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A249967 as a simple table

n a(n)
1 15
2 8823
3 709814
4 18707320
5 251002319
6 2149795141
7 13385651492
8 65717571120
9 268511791119
10 948021599547
11 2972106528666
12 8443442678840
13 22076610372895
14 53774915777897
15 123215084622184
16 267660712891040
17 554792683762767

[15,8823,709814,18707320,251002319,2149795141,
 13385651492,65717571120,268511791119,948021599547,
 2972106528666,8443442678840,22076610372895,
 53774915777897,123215084622184,267660712891040,
 554792683762767]

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Last modified October 21 14:42 EDT 2021. Contains 348155 sequences. (Running on oeis4.)