OFFSET
1,1
LINKS
FORMULA
From Robert Israel, Jun 10 2018: (Start)
For n > 1, a(n) = 10*A014261(n-1) + 5.
a(5*n) = 25 + 10*a(n).
a(5*n+1) = 45 + 10*a(n).
a(5*n+2) = -35 + 10*a(n+1).
a(5*n+3) = -15 + 10*a(n+1).
a(5*n+4) = 5 + 10*a(n+1).
G.f. g(x) satisfies g(x) = -25 - 40*x + 5*(5+9*x-7*x^2-3*x^3+x^4)/(1-x^5) + 10*(1-x^5)*g(x^5)/(x^3*(1-x)).
(End)
EXAMPLE
135 = 5*27 is a term having all odd digits.
MAPLE
L[1]:= [5]:
for n from 2 to 4 do
L[n]:= [seq(op(map(`+`, L[n-1], i*10^(n-1))), i=1..9, 2)]
od:
map(op, [seq(L[i], i=1..4)]); # Robert Israel, Jun 10 2018
MATHEMATICA
Select[5 Range[370], Select[IntegerDigits[#], EvenQ]=={}&] (* Harvey P. Dale, Feb 07 2011 *)
PROG
(PARI) is(n)=n%10==5 && #setintersect(Set(digits(n)), [0, 2, 4, 6, 8])==0 \\ Charles R Greathouse IV, Feb 15 2017
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
Amarnath Murthy, May 29 2001
EXTENSIONS
More terms from Larry Reeves (larryr(AT)acm.org), May 30 2001
STATUS
approved