OFFSET
1,2
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..200
FORMULA
a(n) = (13*120^(n-1) - 13*8^(n-1) - 14*(n-1)*8^(n-1))/448. - Andrew Howroyd, May 10 2020
PROG
(PARI) a(n) = {(13*120^(n-1) - 13*8^(n-1) - 14*(n-1)*8^(n-1))/448} \\ Andrew Howroyd, May 10 2020
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 06 2008
EXTENSIONS
Terms a(7) and beyond from Andrew Howroyd, May 10 2020
STATUS
approved