A171077 Numbers that are multiples of 28 and contain both a 4 and a 7.

476, 784, 1764, 2744, 3472, 3724, 4172, 4676, 4704, 4732, 4760, 4788, 4872, 5740, 6748, 7084, 7140, 7224, 7364, 7420, 7448, 7476, 7504, 7644, 7784, 7840, 7924, 8764, 9744, 10472, 10724, 11704, 12740, 13748, 14476, 14672, 14700

Offset

1,1

Comments

You and your father alternate counting. For every number that is divisible by 4 or contains a 4, substitute "buzz". For every number that is divisible by 7 or contains a 7, substitute "bang". The game is over if a mistake is made.

The sequence is the "Buzz buzz bang bang" sequence, meaning it has the numbers that get 2 buzzes and 2 bangs in this game.

Links

Table of n, a(n) for n=1..37.

Mathematica

Select[28*Range[600], DigitCount[#, 10, 4]>0&&DigitCount[#, 10, 7]>0&] (* Harvey P. Dale, Jul 27 2012 *)

Crossrefs

Sequence in context: A263705 A048428 A253395 * A234077 A205287 A236519

Adjacent sequences: A171074 A171075 A171076 * A171078 A171079 A171080

Keyword

nonn,base

Author

N. J. A. Sloane, Sep 06 2010, based on an email from J. Lowell

Status

approved