cp's OEIS Frontend

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.

A218390 Triangular numbers composed of digits {0,2,4}.

Original entry on oeis.org

40002040, 2442040424202042204020040, 24202244424402424242222220, 200020020000400442044244444400204400200
Offset: 1

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Author

Max Alekseyev, Oct 27 2012

Keywords

Comments

a(5) > 10^40.

Crossrefs

Cf. A000217, A218389. See A119033 for a table of cross-references.

Formula

a(n) = A000217(A218389(n)).