OFFSET
1,2
COMMENTS
2, 4 together with A083420. - R. J. Mathar, Dec 22 2013.
Also, numbers that are not the sum of two distinct odious numbers. - David Radcliffe, Jul 21 2016
LINKS
FORMULA
From Chai Wah Wu, Aug 02 2020: (Start)
a(n) = 5*a(n-1) - 4*a(n-2) for n > 5.
G.f.: x*(12*x^4 - 5*x^3 - 2*x^2 - 3*x + 1)/((x - 1)*(4*x - 1)). (End)
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
Juri-Stepan Gerasimov, Dec 17 2013
EXTENSIONS
Terms corrected by R. J. Mathar, Dec 22 2013
STATUS
approved