A095822 - OEIS

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A095822 as a simple table

n	a(n)
1	3
2	11
3	49
4	87
5	1631
6	11743
7	31967
8	876809
9	8877691
10	4697191
11	1193556233
12	2232105163
13	2222710781
14	3317652307271
15	53319412081141
16	303328210950491
17	2348085347268533
18	313262209859119579
19	42739099682215483

[3,11,49,87,1631,11743,31967,876809,8877691, 4697191,1193556233,2232105163,2222710781, 3317652307271,53319412081141,303328210950491, 2348085347268533,313262209859119579, 42739099682215483]