

A082741


Numbers that have digits consisting only of line segments or both line segments and curves (base 10 digits are 1, 2, 4, 5, 7).


3



1, 2, 4, 5, 7, 11, 12, 14, 15, 17, 21, 22, 24, 25, 27, 41, 42, 44, 45, 47, 51, 52, 54, 55, 57, 71, 72, 74, 75, 77, 111, 112, 114, 115, 117, 121, 122, 124, 125, 127, 141, 142, 144, 145, 147, 151, 152, 154, 155, 157, 171, 172, 174, 175, 177, 211, 212, 214, 215, 217, 221
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OFFSET

1,2


COMMENTS

This sequence allows the digits 2 and 5, formed from combinations of line segments and curves; the subsequence A028373 does not.


LINKS

Alois P. Heinz, Table of n, a(n) for n = 1..1000
Index entries for 10automatic sequences.


MAPLE

a:= proc(n) local d, i, m, r; m:=n; r:=0;
for i from 0 while m>0 do
d:= irem(m, 5, 'm');
if d=0 then d:=5; m:=m1 fi;
r:= r+10^i*[1, 2, 4, 5, 7][d]
od: r
end:
seq(a(n), n=1..100); # Alois P. Heinz, May 25 2014


CROSSREFS

Cf. A028373 (linesegment digits 1, 4, 7 only), A028374 (digits with curves or both curves and line segments), A072960 (curved digits 0, 3, 6, 8, 9 only).
Sequence in context: A331518 A145734 A027936 * A288349 A099522 A255850
Adjacent sequences: A082738 A082739 A082740 * A082742 A082743 A082744


KEYWORD

base,nonn,easy


AUTHOR

Rick L. Shepherd, May 21 2003


STATUS

approved



