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A007872
Sum of indices of windows of trapezoidal maps.
1
1, 1, 1, 4, 9, 27, 89, 304, 944, 3259, 11081, 38044, 132921, 467771, 1650279, 5907280, 21183657, 76488912, 277631065, 1012588940, 3707127319, 13632296219, 50292158921, 186165033296, 691181554768, 2573423459611
OFFSET
1,4
LINKS
P. H. Borcherds and G. P. McCauley, The digital tent map and trapezoidal map, Chaos, Solitons and Fractals, Vol. 3, pp. 451-66 (1993).
CROSSREFS
Cf. A007873.
Sequence in context: A198095 A256096 A071913 * A272016 A272089 A270720
KEYWORD
nonn,more
AUTHOR
Peter H. Borcherds (p.h.borcherds(AT)bham.ac.uk)
STATUS
approved