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Search: id:A070153
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| A070153 |
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Take pairs (a,b) with Sum(j = a to b; j) = concatenation of a and b. Sort pairs on b then a. This sequence gives b of each pair. |
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+0
3
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| 5, 7, 29, 53, 63, 88, 91, 119, 403, 533, 623, 2148, 2353, 2813, 3835, 5333, 6076, 6223, 7889, 8728, 9163, 25039, 26603, 51513, 53333, 55168, 62223, 85338, 93633, 103463, 119063, 134938, 159518, 175238, 185979, 213073, 219413, 235313, 242818, 264888
(list; graph; listen)
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OFFSET
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1,1
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REFERENCES
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R. Hoshino, "Astonishing Pairs of Numbers", Crux Mathematicorum, vol. 27, no. 1, Feb. 2001, pp. 39-44.
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EXAMPLE
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We have 1+...+5=15;2+...+7=27;4+...+29=429;13+...+53=1353;18+...+63=1863, etc.
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CROSSREFS
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Cf. A070152.
Sequence in context: A018776 A104683 A153121 this_sequence A153411 A081630 A135324
Adjacent sequences: A070150 A070151 A070152 this_sequence A070154 A070155 A070156
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KEYWORD
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nonn,base
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AUTHOR
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Lekraj Beedassy (blekraj(AT)yahoo.com), May 06 2002
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EXTENSIONS
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More terms from David W. Wilson, Jun 04, 2002
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