A127404 - OEIS

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A127404

Number of points in a honeycomb net covered by a circular disk of diameter n if the center of the circle is chosen at mid-edge between two grid points.

2, 2, 6, 10, 16, 20, 34, 36, 50, 58, 72, 86, 106, 116, 138, 154, 176, 190, 222, 234, 270, 292

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..22.

EXAMPLE

a(1)=2 because a disk of diameter 1 centered at the middle of an edge covers the 2 net points bounding this edge.

CROSSREFS

Cf. A127402, A127403, A127405, A127406. The corresponding sequences for the square lattice and hexagonal lattice are A053414 and A053417, respectively.

Sequence in context: A077017 A181551 A362934 * A292037 A184842 A181409

Adjacent sequences: A127401 A127402 A127403 * A127405 A127406 A127407

KEYWORD

more,nonn

AUTHOR

Hugo Pfoertner, Feb 08 2007

STATUS

approved