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Search: id:A138594
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| A138594 |
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Sums of 6 or more consecutive integers. |
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+0
2
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| 15, 21, 27, 28, 33, 35, 36, 39, 42, 44, 45, 49, 51, 52, 54, 55, 56, 57, 60, 63, 65, 66, 68, 69, 70, 72, 75, 76, 77, 78, 81
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Also, the numbers of the form s*k+A000217(k-1), s>=0, k>=6. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 31 2008]
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EXAMPLE
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0+1+2+3+4+5=15, 1+2+3+4+5+6=21, 2+3+4+5+6+7=27, 1+2+3+4+5+6+7=28, ...
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MATHEMATICA
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Array[r, 9]; k=0; For[i=0, i<=77, a=i*5+10; For[j=i+5, j<=77, a=a+j; k++; r[k]=a; j++ ]; i++ ]; q=Union[Array[r, k]]; StringTake[ToString[q], 123]
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CROSSREFS
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Sequence in context: A020204 A057489 A070811 this_sequence A131651 A134642 A072974
Adjacent sequences: A138591 A138592 A138593 this_sequence A138595 A138596 A138597
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KEYWORD
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nonn
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AUTHOR
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Vladimir Orlovsky (4vladimir(AT)gmail.com), May 13 2008
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