A247254 a(1)=0; for n>1, a(n+1)= a(n)- A004648(n) if a(n)>= A004648(n) else a(n) + A004648(n).

0, 0, 1, 3, 0, 1, 0, 3, 0, 5, 14, 5, 4, 2, 1, 3, 8, 0, 7, 17, 6, 16, 3, 17, 0, 22, 45, 23, 0, 22, 45, 42, 39, 34, 31, 22, 15, 6, 17, 6, 19, 4, 17, 36, 19, 2, 17, 40, 9, 40, 11, 40, 9, 38, 3, 40, 1, 42, 3, 44, 3, 42, 87, 32, 87, 34, 87, 24, 89, 87, 18, 87, 16, 14

Offset: 1

Author

Michel Lagneau, Nov 30 2014

Keywords

• nonn

Links

• Michel Lagneau, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A004648.

Programs

Maple

A247254 := proc(n)
    option remember;
    local a48 ;
    if n=1 then
        0;
    else
        a48 := A004648(n-1) ;
        if procname(n-1) >= a48 then
            procname(n-1)-a48 ;
        else
            procname(n-1)+a48 ;
        end if;
    end if;
end proc: # R. J. Mathar, Dec 02 2014