A102903 - OEIS

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A102903 as a simple table

n	a(n)
1	5
2	7
3	13
4	31
5	733
6	19687
7	59053
8	31381059613
9	205891132094653
10	109418989131512359213
11	1570042899082081611640534567
12	323257909929174534292273980721360271853391

[5,7,13,31,733,19687,59053,31381059613, 205891132094653,109418989131512359213, 1570042899082081611640534567, 323257909929174534292273980721360271853391]