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A138593
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Sums of 5 or more consecutive nonnegative integers.
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1
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10, 15, 20, 21, 25, 27, 28, 30, 33, 35, 36, 39, 40, 42, 44, 45, 49, 50, 51, 52, 54, 55, 56, 57, 60, 63, 65, 66, 68, 69, 70, 72, 75, 76, 77, 78, 80, 81, 84, 85, 87, 88, 90, 91, 92, 93, 95, 98, 99, 100, 102, 104, 105, 108, 110, 111, 112, 114, 115, 116, 117, 119, 120, 121
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OFFSET
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1,1
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COMMENTS
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Also: the numbers of the form s*k+A000217(k-1), s>=0, k>=5. Changing the lower limit to k from 5 to 2, 4 or 6 also defines A138591, A138592 and A138594. [From R. J. Mathar, Jul 31 2008]
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LINKS
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Ray Chandler, Table of n, a(n) for n = 1..10000
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EXAMPLE
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0+1+2=3+4=10, 1+2+3+4+5=15, 2+3+4+5+6=20, 1+2+3+4+5+6=21,...
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MATHEMATICA
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Array[r, 9]; k=0; For[i=0, i<=55, a=i*4+6; For[j=i+4, j<=66, 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: A118717 A181529 A232501 * A004259 A210652 A284804
Adjacent sequences: A138590 A138591 A138592 * A138594 A138595 A138596
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KEYWORD
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nonn
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AUTHOR
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Vladimir Joseph Stephan Orlovsky, May 13 2008
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EXTENSIONS
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More terms from Vladimir Joseph Stephan Orlovsky, Mar 07 2010
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STATUS
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approved
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