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.

A385977 Length of the long leg of the triangles defined in A377725.

Original entry on oeis.org

4, 112, 3444, 114720, 3883684, 131852560, 4478648724, 152139554112, 5168250745924, 175568295786160, 5964153281301684, 202605640210401120, 6882627596048598244, 233806732521557580112, 7942546277531426709204, 269812766700017940393600, 9165691521502509968254084
Offset: 1

Views

Author

Sean A. Irvine, Jul 13 2025

Keywords

Crossrefs

Cf. A002315, A377725.

Formula

a(n) = 2 * A002315(n) * (A002315(n) + 1).

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

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