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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.

A076046 Ramanujan-Nagell numbers: the triangular numbers (of the form a*(a+1)/2) which are also of the form 2^b - 1.

Table of values

n	a(n)
1	0
2	1
3	3
4	15
5	4095

List of values

[0, 1, 3, 15, 4095]

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

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