OFFSET
1,2
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..500
Artem M. Karavaev, FlowProblem.ru web-project: Hamilton Cycles page.
Index entries for linear recurrences with constant coefficients, signature (12,18,-112,-440,-772,-196,2064,3724,2040,496,128,-16).
FORMULA
a(n) = -16a(n-12) + 128a(n-11) + 496a(n-10) + 2040a(n-9) + 3724a(n-8) + 2064a(n-7) - 196a(n-6) - 772a(n-5) - 440a(n-4) - 112a(n-3) + 18a(n-2) + 12a(n-1) for n > 13.
G.f.: x*(16*x^12 -16*x^11 +8*x^10 -192*x^9 +588*x^8 +1996*x^7 +700*x^6 -474*x^5 -400*x^4 -42*x^3 +24*x^2 -5*x +1)/(16*x^12 -128*x^11 -496*x^10 -2040*x^9 -3724*x^8 -2064*x^7 +196*x^6 +772*x^5 +440*x^4 +112*x^3 -18*x^2 -12*x +1). - Colin Barker, Sep 01 2012
CROSSREFS
KEYWORD
nonn,easy,changed
AUTHOR
Artem M. Karavaev, Sep 10 2010
EXTENSIONS
a(18) onwards from Andrew Howroyd, Feb 18 2025
STATUS
approved