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Search: id:A046023
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A046023 Number of ways to color edges of a tetrahedron using <= n colors. +0
1
0, 1, 12, 87, 416, 1475, 4236, 10437, 22912, 45981, 85900, 151371, 254112, 409487, 637196, 962025, 1414656, 2032537, 2860812, 3953311, 5373600, 7196091, 9507212, 12406637, 16008576, 20443125, 25857676, 32418387, 40311712 (list; graph; listen)
OFFSET

0,3

FORMULA

(n^6+3*n^4+8*n^2)/12.

MAPLE

A046023 := n->(n^6+3*n^4+8*n^2)/12;

CROSSREFS

Cf. A006008.

Sequence in context: A098206 A104911 A091119 this_sequence A137207 A082814 A057406

Adjacent sequences: A046020 A046021 A046022 this_sequence A046024 A046025 A046026

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Apr 11 2001

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Last modified December 10 00:48 EST 2009. Contains 170565 sequences.


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