The tetranacci numbers are a generalization of the Fibonacci Numbers defined by , ,
, , and the Recurrence Relation

for . They represent the case of the Fibonacci

**References**

Sloane, N. J. A. Sequence
A000078/M1108
in ``An On-Line Version of the Encyclopedia of Integer Sequences.''
http://www.research.att.com/~njas/sequences/eisonline.html and Sloane, N. J. A. and Plouffe, S.
*The Encyclopedia of Integer Sequences.* San Diego: Academic Press, 1995.

© 1996-9

1999-05-26