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A000215 as a simple table

n a(n)
0 3
1 5
2 17
3 257
4 65537
5 4294967297
6 18446744073709551617
7 340282366920938463463374607431768211457
8 115792089237316195423570985008687907853269984665640564039457584007913129639937

[3,5,17,257,65537,4294967297,18446744073709551617,
 340282366920938463463374607431768211457,
 11579208923731619542357098500868790785326998466564\
 0564039457584007913129639937]

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Last modified May 22 19:31 EDT 2017. Contains 286885 sequences.