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A249596 Analog of A097717 in base 2. 6
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

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

LINKS

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

MAPLE

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

CROSSREFS

Cf. A094676, A249597, A249598, A249599.

Sequence in context: A220416 A054789 A002508 * A038215 A264110 A119019

Adjacent sequences:  A249593 A249594 A249595 * A249597 A249598 A249599

KEYWORD

nonn,base

AUTHOR

R. J. Mathar, Mar 30 2009

EXTENSIONS

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

STATUS

approved

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Last modified December 12 22:06 EST 2019. Contains 329963 sequences. (Running on oeis4.)