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Search: id:A135499
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| A135499 |
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Numbers for which Sum_digits(odd positions)=Sum_digits(even positions). |
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+0
1
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| 11, 22, 33, 44, 55, 66, 77, 88, 99, 110, 121, 132, 143, 154, 165, 176, 187, 198, 220, 231, 242, 253, 264, 275, 286, 297, 330, 341, 352, 363, 374, 385, 396, 440, 451, 462, 473, 484, 495, 550, 561, 572, 583, 594, 660, 671, 682, 693, 770, 781, 792, 880, 891, 990
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Conjecture: this is a subset of A008593 (verified for the first 50 thousand terms). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 10 2008
Subset of A008593 - Zak Seidov (zakseidov(AT)yahoo.com) Feb 11 2008.
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LINKS
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Paolo P. Lava & Giorgio Balzarotti (ppl(AT)spl.at), Feb 08 2008, Table of n, a(n) for n = 1..119
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EXAMPLE
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594 -> 4+5=9
1023 -> 3+0=2+1
1397 -> 7+3=9+1
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MAPLE
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P:=proc(n) local i, k, w, x; for i from 1 by 1 to n do w:=0; k:=i; while k>0 do w:=w+k-(trunc(k/10)*10); k:=trunc(k/10); od; x:=0; k:=i; while k>0 do x:=x+(k-(trunc(k/10)*10)); k:=trunc(k/100); od; if w=2*x then print(i); fi; od; end: P(3000);
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CROSSREFS
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Adjacent sequences: A135496 A135497 A135498 this_sequence A135500 A135501 A135502
Sequence in context: A048841 A059632 A008593 this_sequence A080195 A004920 A136613
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KEYWORD
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easy,nonn,base
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AUTHOR
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Paolo P. Lava & Giorgio Balzarotti (ppl(AT)spl.at), Feb 08 2008
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