OFFSET
0,2
LINKS
R. J. Mathar, Table of n, a(n) for n = 0..2000
MAPLE
A268234 := proc(n)
local r, c, a, k ;
a := 0;
r :=0;
c :=0;
for k from 0 to n do
a := a+A047999(r, c) ;
c := c+1 ;
if c > r then
c :=0 ;
r := r+1;
end if;
end do:
a;
end proc: # R. J. Mathar, May 06 2016
MATHEMATICA
rows = 14;
ca = CellularAutomaton[60, {{1}, 0}, rows - 1];
Table[ca[[k, 1 ;; k]], {k, 1, rows}] // Flatten // Accumulate (* Jean-François Alcover, Apr 07 2020 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Feb 03 2016
STATUS
approved