|
| |
|
|
A052406
|
|
Numbers without 4 as a digit.
|
|
1
| |
|
|
0, 1, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 17, 18, 19, 20, 21, 22, 23, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 38, 39, 50, 51, 52, 53, 55, 56, 57, 58, 59, 60, 61, 62, 63, 65, 66, 67, 68, 69, 70, 71, 72, 73, 75, 76, 77, 78, 79, 80, 81, 82, 83, 85, 86, 87, 88, 89
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,3
|
|
|
COMMENTS
| This is a frequent sequence on Chinese, Japanese and Korean elevator buttons - Jean-Sebastien Girard (circeus(AT)hotmail.com), Jul 28 2008
|
|
|
LINKS
| Eric Weisstein's World of Mathematics, Uban Number
Wikipedia, Tetraphobia.
|
|
|
PROG
| (PARI) g(n) = { local(x, v, j, flag); for(x=1, n, v=Vec(Str(x)); flag=1; for(j=1, length(v), if(v[j]=="4", flag=0)); if(flag, print1(x", ") ) ) } - Cino Hilliard (hillcino368(AT)hotmail.com), Apr 01 2007
(MAGMA) [ n: n in [0..89] | not 4 in Intseq(n) ]; // Bruno Berselli, May 28 2011
(sh) seq 0 1000 | grep -v 4; # Joerg Arndt, May 29 2011
|
|
|
CROSSREFS
| Cf. A004179, A004723.
Cf. A011760.
Sequence in context: A023839 A004723 A089590 * A022306 A183298 A081023
Adjacent sequences: A052403 A052404 A052405 * A052407 A052408 A052409
|
|
|
KEYWORD
| base,easy,nonn
|
|
|
AUTHOR
| Henry Bottomley (se16(AT)btinternet.com), Mar 13 2000
|
| |
|
|
