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Search: id:A109750
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| A109750 |
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Admirable triangular numbers. |
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+0
1
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OFFSET
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1,1
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COMMENT
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No further term between 523776 and 4050045000. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 11 2008
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FORMULA
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A111592 INTERSECT A000217. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 11 2008
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EXAMPLE
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a(1)=66 because 11*(11+1)/2 = 66 and 1+2+3+11+22+33-6 = 66.
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CROSSREFS
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Cf. A111592.
Sequence in context: A095751 A121478 A128896 this_sequence A127654 A032485 A031411
Adjacent sequences: A109747 A109748 A109749 this_sequence A109751 A109752 A109753
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KEYWORD
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more,nonn
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), Aug 11 2005
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