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A053677
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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 j values.
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2
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6, 40, 454, 2600, 2586, 20175, 48103, 93097, 105805, 265195, 755100, 803007, 1211000, 1111974, 1493421, 1499160, 2622000, 4309280, 5127195, 5574139
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| 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
| i values are A053676 and k values are A053678.
Sequence in context: A000683 A143342 A084270 * A204563 A196449 A186196
Adjacent sequences: A053674 A053675 A053676 * A053678 A053679 A053680
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KEYWORD
| nice,nonn
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AUTHOR
| Klaus Strassburger (strass(AT)ddfi.uni-duesseldorf.de), Feb 16 2000
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EXTENSIONS
| More terms from Larry Reeves (larryr(AT)acm.org), May 07 2001
a(13)-a(16) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Jun 21 2010
a(17)-a(20) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Sep 29 2010
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