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A102794
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The number (666...6)^2.
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5
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1, 36, 4356, 443556, 44435556, 4444355556, 444443555556, 44444435555556, 4444444355555556, 444444443555555556, 44444444435555555556, 4444444444355555555556, 444444444443555555555556, 44444444444435555555555556, 4444444444444355555555555556, 444444444444443555555555555556
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| An infinite sequence of squares with no zeros in base 10.
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FORMULA
| a(n) = (6(10^n-1)/9)^2 = (4/9)(10^(2n) - 2*10^n + 1), which is n-1 4's, followed by a 3, n-1 5's and a 6. - Ignacio Larrosa Canestro, Feb 26 2005
a(n)=A075415(n), n>0. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 30 2008]
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CROSSREFS
| Cf. A052041, A102807.
Sequence in context: A184270 A187405 A075415 * A127856 A127860 A189148
Adjacent sequences: A102791 A102792 A102793 * A102795 A102796 A102797
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KEYWORD
| nonn
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AUTHOR
| Richard Schroeppel, Feb 26 2005
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