A108997 - OEIS

A108997

Coordination sequence for the 120-cell: number of vertices n steps away from a given vertex on the regular 120-cell (hecatonicosachoron or {3,3,5}).

1, 4, 12, 24, 36, 52, 68, 76, 78, 72, 64, 56, 40, 12, 4, 1

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OFFSET

0,2

COMMENTS

The adjacency graph of the 120-cell is a 4-regular graph of girth 5 (pentagonal cycles) and diameter 15. There are 30 distinct nonzero distances between vertices of the 120-cell in 4-space. - Michael Somos, Aug 09 2005

REFERENCES

H. S. M. Coxeter, Introduction to geometry. 2nd edition, John Wiley & Sons, Inc., 1969, pp. 153, 404. MR0346644 (49 #11369)

LINKS

Table of n, a(n) for n=0..15.

Eric Weisstein's World of Mathematics, 120-Cell

Index entries for coordination sequences

CROSSREFS

Cf. A118785, A329499.

Sequence in context: A307763 A071228 A304077 * A159795 A301171 A033602

Adjacent sequences: A108994 A108995 A108996 * A108998 A108999 A109000

KEYWORD

fini,full,nonn

AUTHOR

Andrew Weimholt, Jul 29 2005

STATUS

approved