OFFSET
1,2
COMMENTS
The sequence lists the positive binomial coefficient predictors in base 6. For definition, see paper in link.
LINKS
Alois P. Heinz, Table of n, a(n) for n = 1..1000
V. Shevelev, Binomial Coefficient Predictors, Journal of Integer Sequences, Vol. 14 (2011), Article 11.2.8
MAPLE
a:= proc(n) option remember; local i, l, m, t;
m:= `if`(n=1, 0, a(n-1));
l:=NULL;
for t while m>0 do l:=l, irem(m, 6, 'm') od;
l:= array([l, 0]);
for i while l[i]=5 do od;
if l[i]<4 then l[i]:= l[i]+1
else l[i]:= 5;
if i>1 then l[i-1]:= 4 fi
fi;
add(l[i] *6^(i-1), i=1..t)
end:
seq(a(n), n=1..100); # Alois P. Heinz, Apr 03 2011
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Vladimir Shevelev, Apr 03 2011
STATUS
approved