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	`Sequence in context: A044714 A158128 A162670 this_sequence A081365 A138131 A069858` `Adjacent sequences: A134967 A134968 A134969 this_sequence A134971 A134972 A134973`
	KEYWORD	`fini,nonn,base`
	AUTHOR	`Omar E. Pol (info(AT)polprimos.com), Nov 25 2007, Nov 26 2007`

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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.

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