OFFSET
1,2
REFERENCES
O. Bottema: Verscheidenheden XXVI. Het vraagstuk van Malfatti, Euclides 25 (1949-50), pp. 144-149. [in Dutch].
O. Bottema, The Malfatti problem (translation of Het vraagstuk van Malfatti), Forum Geom. 1 (2001) 43-50.
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..1000
Index entries for linear recurrences with constant coefficients, signature (10,0,-10,1).
FORMULA
a(n) = 10*a(n-1) - 10*a(n-3) + a(n-4).
G.f.: -16*x^2/((x-1)*(x+1)*(x^2-10*x+1)). - Colin Barker, Jun 24 2012
MATHEMATICA
LinearRecurrence[{10, 0, -10, 1}, {0, 16, 160, 1600}, 50] (* G. C. Greubel, May 25 2018 *)
PROG
(PARI) x='x+O('x^30); concat([0], Vec(-16*x^2/((x-1)*(x+1)*(x^2-10*x+1)))) \\ G. C. Greubel, May 25 2018
(Magma) I:=[0, 16, 160, 1600]; [n le 4 select I[n] else 10*Self(n-1) - 10*Self(n-3) +Self(n-4): n in [1..30]]; // G. C. Greubel, May 25 2018
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Antreas P. Hatzipolakis (xpolakis(AT)otenet.gr), Jan 09 2000
EXTENSIONS
More terms from James A. Sellers, Jan 10 2000
STATUS
approved