OFFSET
0,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (35,-446,2440,-4800).
FORMULA
a(n) = 22*a(n-1) - 120*a(n-2) + (8^(n+1) - 5^(n+1))/3, n >= 2. - Vincenzo Librandi, Mar 12 2011
a(n) = (54*12^(n+1) - 105*10^(n+1) + 7*8^(n+2) - 5^(n+2))/21. - Bruno Berselli, Mar 12 2011
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved