A102705 - OEIS

%I #12 Dec 19 2018 10:10:16

%S 0,1,2,3,4,5,6,8,10,11,12,13,15,17,19,20,22,24,26,29,31,33,38,40,47

%N Numbers not of the form 7x + 9y with nonnegative x and y.

%C Non-"Ting!Pong!" numbers: same principle as the "Ding!Bong!" game (see A102701). Here we count the natural numbers replacing 7 by Ting! and 9 by Pong! From 48 on, all numbers are combinations of Tings! or of Pongs!

%H Gianni A. Sarcone and Marie-Jo Waeber, <a href="http://www.archimedes-lab.org/numbers/Num1_69.html#dingbong">Can you count in 'ding-bong'?</a>.

%e 0 1 2 3 4 5 6 Ting! 8 Pong! 10 11 12 13 Ting-Ting! 15 Ting-Pong! 17 Pong-Pong! 19 20 Ting-Ting-Ting! 22 Ting-Ting-Pong! ...

%Y Cf. A102701.

%K less,easy,fini,full,nonn

%O 0,3

%A _Alexandre Wajnberg_, Feb 04 2005