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A071843 Gives an LCD representation of n. 0
119, 17, 107, 59, 29, 62, 126, 19, 127, 63, 15249, 2193, 13713, 7569, 3729, 7953, 16145, 2449, 16273, 8081, 15339, 2283, 13803, 7659, 3819, 8043, 16235, 2539, 16363, 8171, 15291, 2235, 13755, 7611, 3771, 7995, 16187, 2491, 16315, 8123, 15261, 2205 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

This is based on the following way of writing "8":

|--2--|

4.....1

|--8--|

64...16

|-32--|

The powers of 2 present in the LCD representation are added. For example: n=1 gives 1 + 16 = 17. According to the position of a digit in n, [1,2,4...] is replaced by [128,256...],[16384,32768...], etc.

LINKS

Table of n, a(n) for n=0..41.

PROG

(scilab) function lcd: nb: final result ndc: number of digits u: interesting digit M(i, j): (j-1)th bit of (i-1) function [nb]=lcd(n); nb=0; M=[1 1 1 0 1 1 1; 1 0 0 0 1 0 0; 1 1 0 1 0 1 1; 1 1 0 1 1 1 0; 1 0 1 1 1 0 0; 0 1 1 1 1 1 0; 0 1 1 1 1 1 1; 1 1 0 0 1 0 0; 1 1 1 1 1 1 1; 1 1 1 1 1 1 0]; if n <> 0 then ndc=int(log10(n))+1, else ndc = 1, end; for cx = ndc:-1:1; u=int(n/(10^(cx-1))); n=n-u*(10^(cx-1)); for j=0:6; nb=nb+M(u+1, j+1)*2^(j+7*(ndc-cx)), end, end; endfunction

CROSSREFS

Cf. A006942 (bitcount).

Coding and glyph variations: A234691, A234692.

Sequence in context: A143776 A191949 A013683 * A234691 A252955 A171697

Adjacent sequences:  A071840 A071841 A071842 * A071844 A071845 A071846

KEYWORD

nonn,base,easy

AUTHOR

anon, Jun 08 2002

EXTENSIONS

More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 21 2003

STATUS

approved

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Last modified February 27 11:38 EST 2021. Contains 341656 sequences. (Running on oeis4.)