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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.

A105667 1/(2k)-th of area of primitive Pythagorean triangle with hypotenuse 5^(2^n), where k is the product of all Mersenne primes not exceeding 2^(n+2) - 1.

Table of values

n a(n)
0 1
1 2
2 4216
3 44834576

List of values

[1, 2, 4216, 44834576]

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

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