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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.

A218400 Numbers k such that the k-th triangular number contains only digits {0,4,7}.

Table of values

n	a(n)
1	284
2	3080
3	97680
4	9460126854061817544

List of values

[284, 3080, 97680, 9460126854061817544]

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

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