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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A259534 a(n) = -1 + 2 * product_{i=0..n} A093179(i), where A093179(i) is the smallest prime factor of 2^(2^i) + 1.

Table of values

n a(n)
0 5
1 29
2 509
3 131069
4 8589934589
5 5506148072189
6 1509659159988837629
7 90050548615896750734368618889875709
8 111565998552535226317138856424609779410946920431869
9 270528914968139650436266764640655805238384653911572627709

List of values

[5, 29, 509, 131069, 8589934589, 5506148072189, 1509659159988837629, 90050548615896750734368618889875709, 111565998552535226317138856424609779410946920431869, 270528914968139650436266764640655805238384653911572627709]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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