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A199554 as a simple table

n a(n)
0 7
1 49
2 385
3 3073
4 24577
5 196609
6 1572865
7 12582913
8 100663297
9 805306369
10 6442450945
11 51539607553
12 412316860417
13 3298534883329
14 26388279066625
15 211106232532993
16 1688849860263937
17 13510798882111489
18 108086391056891905

[7,49,385,3073,24577,196609,1572865,12582913,
 100663297,805306369,6442450945,51539607553,
 412316860417,3298534883329,26388279066625,
 211106232532993,1688849860263937,
 13510798882111489,108086391056891905]

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Last modified January 30 16:57 EST 2023. Contains 359945 sequences. (Running on oeis4.)