A084912 a(1) = 1024; a(n) = 5*a(n-1)/8.

1024, 640, 400, 250

Offset

1,1

Comments

Puzzle: a man offered to sell me a car two years ago for $1024; a year later his price was $640; a little while after that he asked $400; and last week he was willing to sell for $250. The next time he reduces I shall buy. At what price will I buy the car if he makes consistent reductions?

Answer: a(5) = 1250/8 = $156.25 (not an integer).

Links

Table of n, a(n) for n=1..4.

Mathematica

NestList[5/8 #&, 1024, 3] (* Harvey P. Dale, Nov 07 2017 *)

Crossrefs

Sequence in context: A176764 A351262 A336778 * A336780 A217850 A023075

Adjacent sequences: A084909 A084910 A084911 * A084913 A084914 A084915

Keyword

nonn,dumb,easy,fini,full

Author

Matt Kimbrough (mkimbrough(AT)mfrpc.com), Jul 14 2003

Extensions

G.f. removed by Georg Fischer, May 15 2019

Status

approved