OFFSET
1,2
LINKS
FORMULA
G.f.: x*(1 + 10*x + 4*x^2 - 4*x^3)/((1 - x)^2*(1 + x)).
a(n) = floor(11*n/2) = (22*n + (-1)^n - 1)/4 with n>1, a(1)=1.
a(n) = a(n-1) + a(n-2) - a(n-3) for n>4.
EXAMPLE
For n=1, there are ten equally likely outcomes, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 and the smallest of these is 1, so a(1)=1.
MATHEMATICA
Join[{1}, Table[(22 n + (-1)^n - 1)/4, {n, 2, 50}]]
PROG
(PARI) a(n)=if(n<2, 1, 11*n\2);
vector(50, n, a(n))
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Gianmarco Giordano, Nov 06 2015
STATUS
approved