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Search: id:A068127
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| A068127 |
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Triangular numbers with sum of digits = 3. |
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+0
7
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| 3, 21, 120, 210, 300, 10011, 20100, 2001000, 200010000, 20000100000, 2000001000000
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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1. The sequence is unbounded, as the 2*10^k -th triangular number is a term. 2. The sum of the digits of triangular numbers in most cases is a triangular number.
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CROSSREFS
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Sequence in context: A046727 A084159 A117512 this_sequence A144884 A004658 A034552
Adjacent sequences: A068124 A068125 A068126 this_sequence A068128 A068129 A068130
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KEYWORD
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base,easy,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Feb 21 2002
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EXTENSIONS
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More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Mar 06 2002
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