OFFSET
1,1
COMMENTS
Omitting digits for odd powers of 2i (all 0's for the imaginary parts) (e.g. 1030003 --> 1303) gives A212526 (negative integers in base -4).
LINKS
Joerg Arndt, Table of n, a(n) for n = 1..1000
EXAMPLE
a(13) = 1030003: 1*(2*i)^6 + 0 + 3*(2*i)^4 + 0 + 0 + 0 + 3*(2*i)^0 = -64 + 48 + 3 = -13.
MAPLE
a:= proc(n) local d, i, l, m;
m:= n; l:= NULL;
for i from 0 while m>0 do
d:= irem(m, 4, 'm');
if irem(i, 2)=0 and d>0 then d:= 4-d; m:= m+1 fi;
l:= d, 0, l
od; parse(cat(l))/10
end:
seq(a(n), n=1..60); # Alois P. Heinz, May 20 2012
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Joerg Arndt, May 20 2012
STATUS
approved