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A003011 as a simple table

n a(n)
0 1
1 3
2 19
3 271
4 7365
5 326011
6 21295783
7 1924223799
8 229714292041
9 35007742568755
10 6630796801779771
11 1527863209528564063
12 420814980652048751629
13 136526522051229388285611

[1,3,19,271,7365,326011,21295783,1924223799,
 229714292041,35007742568755,6630796801779771,
 1527863209528564063,420814980652048751629,
 136526522051229388285611]

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Last modified December 9 16:14 EST 2016. Contains 278985 sequences.