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A096129
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Middle term of a triple of consecutive numbers which are sums of two squares.
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0
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1, 9, 73, 289, 801, 1801, 3529, 6273, 10369, 16201, 24201, 34849, 48673, 66249, 88201, 115201, 147969, 187273, 233929, 288801, 352801, 426889, 512073, 609409, 720001, 845001, 985609, 1143073, 1318689, 1513801, 1729801, 1968129, 2230273
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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FORMULA
| a(n)=8*A000537(n) + 1.
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EXAMPLE
| 1801 is in the sequence because we may for instance write 1800 = 6^2 + 42^2; 1801 = 24^2 + 35^2; 1802 = 29^2 + 31^2.
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CROSSREFS
| Cf. A001481.
Sequence in context: A043079 A099973 A091986 * A143571 A079927 A126641
Adjacent sequences: A096126 A096127 A096128 * A096130 A096131 A096132
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KEYWORD
| nonn
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AUTHOR
| Lekraj Beedassy (blekraj(AT)yahoo.com), Jul 23 2004
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EXTENSIONS
| Corrected and extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Jul 29 2004
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