A249598 -id:A249598 - cp's OEIS frontend

A249596 Analog of A097717 in base 2.

1, 2, 9, 4, 35, 558, 2205, 8, 135, 137970, 33, 1068, 545259, 135926, 138845925, 16, 527, 2106, 35288379945, 2100, 537075, 8382, 2093, 4283544, 1069975, 130, 2294286602622705, 533820, 133371, 146557818382226310, 585910928570692725, 32, 2079

Offset: 1

R. J. Mathar, Mar 30 2009

Conjecture: a(n) = n*A165781(n). - R. J. Mathar, Nov 11 2014

Lars Blomberg, Table of n, a(n) for n = 1..1661

Cf. A094676, A249597, A249598, A249599.

A249596 := proc(n)
    local m,b,mbas,msf ;
    b := 2;
    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,A249596(n)) ;
end do: # R. J. Mathar, Nov 11 2014

a(15)-a(33) from Lars Blomberg, Feb 05 2015

A249599 Analog of A097717 in base 5.

Original entry on oeis.org

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

Offset: 1

R. J. Mathar, Mar 30 2009

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

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

Cf. A094676, A249596, A249597, A249598.

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

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

A249597 Analog of A097717 in base 3.

Original entry on oeis.org

1, 32, 3, 88, 260, 15192960, 28, 61616, 9, 7888549122400, 55, 182208, 132538588, 2240, 165, 32048741728, 1185506696, 2194329698227926780769440, 247, 23264534699960, 69737318935284, 179872, 14559920, 16912071582760464, 130885300, 69521680967024, 27

Offset: 1

R. J. Mathar, Mar 30 2009

Lars Blomberg, Table of n, a(n) for n = 1..709

Cf. A094676, A249596, A249598, A249599.

a(6)-a(26) from Lars Blomberg, Feb 04 2015

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A249596 Analog of A097717 in base 2.

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A249599 Analog of A097717 in base 5.

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A249597 Analog of A097717 in base 3.

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