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.

A218397 Triangular numbers composed of digits {0,2,7}.

Original entry on oeis.org

70007020020, 27272070272700, 20720272227227700077007700020, 22200020770272007007202277772702722200
Offset: 1

Views

Author

Max Alekseyev, Oct 28 2012

Keywords

Comments

a(5) > 10^40.

Links

Crossrefs

Cf. A000217, A218398. See A119033 for a table of cross-references.

Formula

a(n) = A000217(A218398(n)).

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

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