OFFSET
1,1
COMMENTS
a(n) is the number whose binary representation is A152775(n).
LINKS
Zak Seidov, Table of n, a(n) for n = 1..100
Index entries for linear recurrences with constant coefficients, signature (8,1,-8).
FORMULA
From R. J. Mathar, Jan 20 2009: (Start)
a(n)= 8*a(n-1) +a(n-2) -8*a(n-3).
G.f.: 7x/((1-x)(1-8x)(1+x)).
a(n)= (-7*(-1)^n-9+16*8^n)/18 = 7*A033118(n). (End)
E.g.f.: (8*(cosh(8*x) - cosh(x) + sinh(8*x)) - sinh(x))/9. - Stefano Spezia, Nov 03 2025
CROSSREFS
KEYWORD
easy,nonn,base
AUTHOR
Omar E. Pol, Jan 18 2009
EXTENSIONS
More terms from R. J. Mathar, Jan 20 2009
STATUS
approved