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Search: id:A061479
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| A061479 |
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Smallest number m such that first digit - second digit + third digit - fourth digit ... (of m) = n. |
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+0
27
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| 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 109, 209, 309, 409, 509, 609, 709, 809, 909, 10909, 20909, 30909, 40909, 50909, 60909, 70909, 80909, 90909, 1090909, 2090909, 3090909, 4090909, 5090909, 6090909, 7090909, 8090909, 9090909, 109090909, 209090909
(list; graph; listen)
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OFFSET
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0,3
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EXAMPLE
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a(14) = 509 as 5-0+9 =14 and it is the smallest such number.
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MATHEMATICA
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m = 0; Do[ While[ a = IntegerDigits[ m ]; l = Length[ a ]; e = o = {}; Do[ o = Append[ o, a[ [ 2k - 1 ] ] ], {k, 1, l/2 + .5} ]; Do[ e = Append[ e, a[ [ 2k ] ] ], {k, 1, l/2} ]; Abs[ Apply[ Plus, o ] - Apply [ Plus, e ] ] != n, m++ ]; Print[ m ], {n, 1, 50} ]
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CROSSREFS
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Cf. A008593, A060978-A060980, A060982, A061470-A061478, A061870-A061882.
Sequence in context: A050783 A030147 A077726 this_sequence A028431 A056143 A106003
Adjacent sequences: A061476 A061477 A061478 this_sequence A061480 A061481 A061482
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KEYWORD
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nonn,base
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), May 05 2001
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EXTENSIONS
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More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), May 10 2001
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