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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.

A228763 a(n) = 2^L(n) - 1, where L(n) is the n-th Lucas number (A000032).

Table of values

n a(n)
0 3
1 1
2 7
3 15
4 127
5 2047
6 262143
7 536870911
8 140737488355327
9 75557863725914323419135
10 10633823966279326983230456482242756607
11 803469022129495137770981046170581301261101496891396417650687

List of values

[3, 1, 7, 15, 127, 2047, 262143, 536870911, 140737488355327, 75557863725914323419135, 10633823966279326983230456482242756607, 803469022129495137770981046170581301261101496891396417650687]

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

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