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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
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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; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| 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
| Cf. A068833.
Sequence in context: A044865 A162529 A179444 * A067521 A117686 A104113
Adjacent sequences: A068831 A068832 A068833 * A068835 A068836 A068837
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KEYWORD
| base,hard,nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 09 2002
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EXTENSIONS
| More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Mar 26 2002
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