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A028820
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Squares with digits in ascending order.
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1
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0, 1, 4, 9, 16, 25, 36, 49, 144, 169, 225, 256, 289, 1156, 1225, 1369, 1444, 4489, 6889, 11236, 11449, 13456, 13689, 27889, 33489, 111556, 112225, 113569, 134689, 146689, 344569, 444889, 2666689, 2778889, 11115556, 11122225
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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LINKS
| P. De Geest, Palindromic Squares
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PROG
| (PARI) mono(n)=n=eval(Vec(Str(n))); for(i=2, #n, if(n[i]<n[i-1], return(0))); 1
for(n=1, 800, if(mono(n^2), print1(n^2", "))) \\ Charles R Greathouse IV, Aug 22 2011
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CROSSREFS
| Cf. A028819.
Sequence in context: A030154 A122541 A133743 * A122683 A072862 A062295
Adjacent sequences: A028817 A028818 A028819 * A028821 A028822 A028823
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KEYWORD
| nonn,base
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AUTHOR
| Patrick De Geest (pdg(AT)worldofnumbers.com)
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