A249599 Analog of A097717 in base 5.

1, 16, 3348, 411184, 5, 1262796336, 31415153952, 128, 639, 46402790906782052954848931760, 9548, 37884308119951668432, 507, 483747841655344, 2949712546290578068913640, 368402917173844349535205696, 3162, 1149642179207353109724066230688

Offset: 1

Author

R. J. Mathar, Mar 30 2009

Keywords

• nonn
• base

Examples

			a(2)=16, because in base 5, 16 is written 31 and 16/2 is 8 and written 13.
		

Links

• Lars Blomberg, Table of n, a(n) for n = 1..369

Crossrefs

Cf. A094676, A249596, A249597, A249598.

Programs

Maple

A249599 := proc(n)
    local m,b,mbas,msf ;
    b := 5;
    for m from 1 to 1999999 do
        mbas := convert(m,base,b) ;
        msf := [op(-1,mbas),op(1..nops(mbas)-1,mbas)] ;
        msf := add(op(i,msf)*b^(i-1),i=1..nops(msf)) ;
        if m/n = msf then
            return m;
        end if;
    end do:
    -1 ;
end proc:
for n from 1 do
    print(n,A249599(n)) ;
end do: # R. J. Mathar, Nov 11 2014

Extensions

a(6)-a(18) from Lars Blomberg, Feb 05 2015