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A034101 Decimal part of square root of a(n) starts with digit 5. 2
21, 31, 43, 57, 73, 91, 92, 111, 112, 133, 134, 157, 158, 183, 184, 211, 212, 213, 241, 242, 243, 273, 274, 275, 307, 308, 309, 343, 344, 345, 381, 382, 383, 384, 421, 422, 423, 424, 463, 464, 465, 466, 507, 508, 509, 510, 553, 554, 555, 556, 601, 602, 603 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Harvey P. Dale, Table of n, a(n) for n = 0..1000

MATHEMATICA

fp5Q[n_]:=Module[{rd=RealDigits[N[FractionalPart[Sqrt[n]]]]}, rd[[2]]==0 && First[rd[[1]]]==5]; Select[Range[700], fp5Q] (* Harvey P. Dale, Jan 11 2013 *)

CROSSREFS

Cf. A034111.

Sequence in context: A123846 A168000 A031889 * A034111 A077687 A113762

Adjacent sequences:  A034098 A034099 A034100 * A034102 A034103 A034104

KEYWORD

nonn,easy,base

AUTHOR

Patrick De Geest, Sep 15 1998

STATUS

approved

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Last modified January 25 01:44 EST 2020. Contains 331229 sequences. (Running on oeis4.)