OFFSET
1,16
REFERENCES
G. Balzarotti and P. P. Lava, 103 curiosità matematiche, Hoepli, 2010, p. 275.
Clifford A. Pickover, The Crying of Fractal Batrachion 1,489. Chaos and Graphics, Comput. and Graphics, vol. 19, No. 4, pages 611-615, 1995.
LINKS
Paolo P. Lava, Table of n, a(n) for n = 1..10000
FORMULA
a(n) = a(a(n-1)) + a(n-a(n-2)) - a(a(n-3)) + a(a(n-5)), with a(n) = 1 for n <= 15.
lim_{n->oo} a(n)/n = 1/4.
MAPLE
MATHEMATICA
a[n_Integer] := a[n] = If[n < 16, 1, a[a[n - 1]] + a[n - a[n - 2]] - a[a[n - 3]] + a[a[n - 5]]]; Table[a[n], {n, 500}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Paolo P. Lava and Roger L. Bagula, Mar 14 2012
STATUS
approved