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Search: id:A053678
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| A053678 |
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Let Oc(n) = A005900(n) = n-th octahedral number. Consider all integer triples (i,j,k), j >= k > 0, with Oc(i) = Oc(j)+Oc(k), ordered by increasing i; sequence gives k values. |
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+0
5
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| 5, 17, 191, 1412, 2143, 8393, 5346, 32475, 99234, 158712, 393981, 401023
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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Oc(7) = 231 = Oc(6) + Oc(5); Oc(41) = 45961 = Oc(40) + Oc(17); Oc(465) = 67029905 = Oc(454) + Oc(191)
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CROSSREFS
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i values are A053676 and j values are A053677.
Sequence in context: A119769 A090886 A097490 this_sequence A090645 A096407 A062230
Adjacent sequences: A053675 A053676 A053677 this_sequence A053679 A053680 A053681
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KEYWORD
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nice,nonn
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AUTHOR
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Klaus Strassburger (strass(AT)ddfi.uni-duesseldorf.de), Feb 16 2000
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EXTENSIONS
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More terms from Larry Reeves (larryr(AT)acm.org), May 07 2001
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