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A045855 Numbers n such that n^2 has initial digit '1'. 5
1, 4, 10, 11, 12, 13, 14, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

N. J. A. Sloane, Table of n, a(n) for n = 1..20000

MATHEMATICA

Select[Range[150], First[IntegerDigits[#^2]]==1&] (* Harvey P. Dale, Aug 28 2012 *)

CROSSREFS

Cf. A045784, A272671.

Sequence in context: A264163 A223165 A263558 * A244216 A240580 A102535

Adjacent sequences:  A045852 A045853 A045854 * A045856 A045857 A045858

KEYWORD

nonn,base

AUTHOR

Jeff Burch

STATUS

approved

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Last modified May 29 16:53 EDT 2017. Contains 287252 sequences.