A102705 Numbers not of the form 7x + 9y with nonnegative x and y.

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

Offset

0,3

Comments

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!

Links

Table of n, a(n) for n=0..24.

Gianni A. Sarcone and Marie-Jo Waeber, Can you count in 'ding-bong'?.

Example

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! ...

Crossrefs

Cf. A102701.

Sequence in context: A094942 A243494 A302505 * A180636 A182625 A333909

Adjacent sequences: A102702 A102703 A102704 * A102706 A102707 A102708

Keyword

less,easy,fini,full,nonn

Author

Alexandre Wajnberg, Feb 04 2005

Status

approved