id:A134970 - OEIS Search Results

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Canyon numbers.

+0
6

101, 202, 212, 303, 313, 323, 404, 414, 424, 434, 505, 515, 525, 535, 545, 606, 616, 626, 636, 646, 656, 707, 717, 727, 737, 747, 757, 767, 808, 818, 828, 838, 848, 858, 868, 878, 909, 919, 929, 939, 949, 959, 969, 979, 989, 2012, 2102, 3013, 3023 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`The structure of digits represent a canyon (a deep valley between cliffts). The first digit is equal to last digit. The first digits are in decreasing order. The last ligits are in increasing order. The numbers only have a smaller digit that represent the botton of the canyon. This sequence is finite. The last member is 9876543210123456789.`
	EXAMPLE	`4104 is a canyon number:` `4 . . 4` `. . . .` `. . . .` `. 1 . .` `. . 0 .`
	CROSSREFS	`Adjacent sequences: A134967 A134968 A134969 this_sequence A134971 A134972 A134973` `Sequence in context: A100775 A044333 A044714 this_sequence A081365 A138131 A069858`
	KEYWORD	`fini,nonn,base`
	AUTHOR	`Omar E. Pol (info(AT)polprimos.com), Nov 25 2007, Nov 26 2007`

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Last modified October 11 09:12 EDT 2008. Contains 144832 sequences.

AT&T Labs Research