A007872 Sum of indices of windows of trapezoidal maps.

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

Table of n, a(n) for n=1..26.

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

Adjacent sequences: A007869 A007870 A007871 * A007873 A007874 A007875

Keyword

nonn,more

Author

Peter H. Borcherds (p.h.borcherds(AT)bham.ac.uk)

Status

approved