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.

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A356835 Coordination sequence of the {4,3,5} hyperbolic honeycomb.

Original entry on oeis.org

1, 6, 30, 126, 498, 1982, 7854, 31014, 122562, 484422, 1914254, 7564542, 29893554, 118131966, 466827678, 1844789414, 7290156162, 28808903814, 113845717662, 449890341534, 1777856189330, 7025651266782, 27763649373966, 109715127592326, 433567254075330, 1713351367231142, 6770744053574286
Offset: 0

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Author

Eryk Kopczynski, Aug 31 2022

Keywords

Comments

a(n) is the number of cells n steps from an (arbitrarily chosen) central cell in the {4,3,5} honeycomb.

Examples

			For example, each cell has 6 neighbors, so a(1) = 6.
Each of these has 6 neighbors -- 5 not counting the original cube -- so a(2)=30.

Links

Crossrefs

First differences of A247308.

Formula

a(n) = A247308(n) - A247308(n-1).
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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