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Search: id:A102705
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| A102705 |
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Non-"Ting!Pong!" numbers: numbers which are not a combination of 7's and/or 9's. |
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+0
3
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| 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
(list; graph; listen)
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OFFSET
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0,3
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COMMENT
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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!
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LINKS
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Site map then "math curiosities" then "number cyclopedia" then Number 5, Number 5.
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EXAMPLE
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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! ...
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CROSSREFS
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Cf. A102701.
Sequence in context: A034047 A047424 A094942 this_sequence A088232 A070994 A057197
Adjacent sequences: A102702 A102703 A102704 this_sequence A102706 A102707 A102708
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KEYWORD
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dumb,easy,fini,full,nonn
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AUTHOR
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Alexandre Wajnberg (alexandre.wajnberg(AT)ulb.ac.be), Feb 04 2005
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