A011538 Numbers that contain an 8.

8, 18, 28, 38, 48, 58, 68, 78, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 98, 108, 118, 128, 138, 148, 158, 168, 178, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 198, 208, 218, 228, 238, 248, 258, 268, 278, 280, 281, 282, 283, 284, 285, 286, 287, 288, 289

Offset

1,1

Comments

In China, numbers with many 8 digits are considered auspicious because the character for 8 (八) sounds like the character for wealth (發). - Charles R Greathouse IV, Aug 28 2012

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..3439

Index entries for 10-automatic sequences.

Formula

a(n) ~ n. - Charles R Greathouse IV, Aug 28 2012

Mathematica

Select[Range[400], DigitCount[#, 10, 8]>0 &] (* Vincenzo Librandi, Feb 15 2017 *)

Prog

(PARI) is(n)=!!setsearch(Set(digits(n)), 8) \\ Charles R Greathouse IV, Feb 12 2017
(Magma) [n: n in [0..400] | 8 in Intseq(n) ]; // Vincenzo Librandi, Feb 15 2017
(GAP) Filtered([1..290], n->8 in ListOfDigits(n)); # Muniru A Asiru, Feb 24 2019
(Python)
def ok(n): return '8' in str(n)
print(list(filter(ok, range(290)))) # Michael S. Branicky, Aug 18 2021

Crossrefs

Supersequence of A043521.

Sequence in context: A347640 A347995 A248015 * A283611 A043521 A277595

Adjacent sequences: A011535 A011536 A011537 * A011539 A011540 A011541

Keyword

nonn,base,easy

Author

N. J. A. Sloane.

Status

approved