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Search: id:A135602
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| A135602 |
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Right-angled numbers with an internal digit as the vertex. |
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+0
9
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| 101, 121, 212, 232, 323, 343, 434, 454, 545, 565, 656, 676, 767, 787, 878, 898, 989, 1012, 1210, 1232, 2101, 2123, 2321, 2343, 3212, 3234, 3432, 3454, 4323, 4345, 4543, 4565, 5434, 5456, 5654, 5676, 6545, 6567, 6765, 6787, 7656, 7678
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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The structure of digits represent an right angle. The vertex is an internal digit. In the graphic representation the points are connected by imaginary line segments from left to right. This sequence is finite. The last member has 19 digits: 9876543210123456789.
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EXAMPLE
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Illustration using the last member of this sequence:
9 . . . . . . . . . . . . . . . . . 9
. 8 . . . . . . . . . . . . . . . 8 .
. . 7 . . . . . . . . . . . . . 7 . .
. . . 6 . . . . . . . . . . . 6 . . .
. . . . 5 . . . . . . . . . 5 . . . .
. . . . . 4 . . . . . . . 4 . . . . .
. . . . . . 3 . . . . . 3 . . . . . .
. . . . . . . 2 . . . 2 . . . . . . .
. . . . . . . . 1 . 1 . . . . . . . .
. . . . . . . . . 0 . . . . . . . . .
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CROSSREFS
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Cf. A134810, A134853, A134941, A134970, A135641, A135642, A135643, A135600, A135601, A135603.
Sequence in context: A084430 A046075 A088882 this_sequence A095635 A060916 A075793
Adjacent sequences: A135599 A135600 A135601 this_sequence A135603 A135604 A135605
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KEYWORD
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base,fini,nonn
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AUTHOR
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Omar E. Pol (info(AT)polprimos.com), Dec 02 2007
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