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Search: id:A068834
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| A068834 |
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Square such that the next three squares also having a square digit sum. |
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+0
1
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| 81, 100, 121, 144, 400, 10000, 10201, 10404, 12100, 40000, 1000000, 1002001, 1004004, 1020100, 1172889, 1210000, 1232100, 2604996, 4000000, 4297329, 4485924, 6185169, 11048976, 11108889, 12916836, 14584761, 16353936, 23040000
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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a(7) = 81 as the sum of the digits of 7 consecutive squares 81,100,121,144,169,196 and 225 is a square.
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CROSSREFS
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Cf. A068833.
Sequence in context: A124968 A044865 A162529 this_sequence A067521 A117686 A104113
Adjacent sequences: A068831 A068832 A068833 this_sequence A068835 A068836 A068837
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KEYWORD
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base,hard,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 09 2002
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EXTENSIONS
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More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Mar 26 2002
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