A160517 A walk of 10-divisible "less regular" figurate cuboctahedra, from sequence A160249.

10, 20, 50, 80, 140, 200, 300, 400, 550, 700, 910, 1120, 1400, 1680, 2040, 2400, 2850, 3300, 3850, 4400, 5060, 5720, 6500, 7280, 8190, 9100, 10150, 11200, 12400, 13600

Offset

1,1

Comments

This is only the first walk of 10-divisibles, but it is the closest to the diagonal, and so its hedra will look the most regular for their size. It occurs only 5root2/2 moves from the diagonal. The next closest is 7root2 moves away, and is half the density.

Many of these are 100-divisible. The source array contains many numbers that are multiples of high powers of 10, including a ten thousand, a 1001000, a 2005000 and a 3 million.

References

Polyhedra primer / Peter Pearce and Susan Pearce. Published/Created: New York : Van Nostrand Reinhold, c1978. Description: viii, 134 p. : ill. ; 24 cm. ISBN: 0442264968

The book of numbers / John H. Conway, Richard K. Guy. Published/Created: New York, NY : Copernicus c1996. Description: ix, 310 p. : ill. (some col.) ; 24 cm. ISBN: 038797993X

Links

Table of n, a(n) for n=1..30.

Crossrefs

Sequence in context: A284991 A327692 A269234 * A072081 A034087 A117562

Adjacent sequences: A160514 A160515 A160516 * A160518 A160519 A160520

Keyword

easy,nonn,tabl,uned

Author

Chris G. Spies-Rusk (chaosorder4(AT)gmail.com), May 16 2009

Status

approved