OFFSET
1,1
LINKS
Robert Israel, Table of n, a(n) for n = 1..10000
FORMULA
EXAMPLE
a(4) = 272 = 16^2+16^1.
MAPLE
A055261:= proc(n)
local p1, p2;
p1:= floor((sqrt(8*n-7)-1)/2);
p2:= n - 1 - p1*(p1+1)/2;
16^p1 + 16^p2
end proc; # Robert Israel, Apr 07 2014
CROSSREFS
KEYWORD
AUTHOR
Henry Bottomley, Jun 22 2000
STATUS
approved