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A068144
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Triangular numbers which are a concatenation of two or more positive triangular numbers.
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1
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36, 66, 136, 153, 378, 666, 1128, 1378, 1711, 2145, 3003, 3321, 3655, 3741, 3916, 4656, 6105, 6216, 6328, 6786, 6903, 10153, 11325, 11628, 11781, 13366, 13861, 16110, 19110, 21115, 21321, 21528, 32131, 33153, 35511, 35778, 36315, 39903
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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LINKS
| Jon Schoenfield, Table of n, a(n) for n = 1..1000
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EXAMPLE
| 1378 is the concatenation of 1, 3 and 78. 16110 is the concatenation of 1, 6, 1 and 10.
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CROSSREFS
| Cf. A000217.
Sequence in context: A074315 A126789 A176623 * A192026 A036785 A114127
Adjacent sequences: A068141 A068142 A068143 * A068145 A068146 A068147
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KEYWORD
| nonn,base
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Feb 23 2002
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EXTENSIONS
| Corrected and extended by Jon E. Schoenfield (jonscho(AT)hiwaay.net), Sep 06 2006
Edited by Charles R Greathouse IV (charles.greathouse(AT)case.edu), Apr 28 2010
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