A096637 - OEIS

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A096637 as a simple table

n	a(n)
0	17
1	73
2	241
3	1009
4	2689
5	8089
6	33049
7	53881
8	87481
9	483289
10	515761
11	1083289
12	7921489
13	3818929
14	9257329
15	22000801
16	68204761
17	48473881
18	175244281
19	1149374521
20	427733329
21	898716289

[17,73,241,1009,2689,8089,33049,53881,87481, 483289,515761,1083289,7921489,3818929,9257329, 22000801,68204761,48473881,175244281,1149374521, 427733329,898716289]