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A045861 Numbers whose square has initial digit '7'. 2
27, 28, 84, 85, 86, 87, 88, 89, 265, 266, 267, 268, 269, 270, 271, 272, 273, 274, 275, 276, 277, 278, 279, 280, 281, 282, 837, 838, 839, 840, 841, 842, 843, 844, 845, 846, 847, 848, 849, 850, 851, 852, 853, 854, 855, 856, 857, 858, 859, 860, 861, 862, 863 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Seiichi Manyama, Table of n, a(n) for n = 1..10000

MATHEMATICA

Flatten[Table[Range[Ceiling[Sqrt[7 10^i]], Floor[Sqrt[8 10^i-1]]], {i, 2, 5}]]  (* Harvey P. Dale, Mar 06 2011 *)

CROSSREFS

Cf. A045791.

Sequence in context: A042480 A042478 A042476 * A042488 A042486 A290276

Adjacent sequences:  A045858 A045859 A045860 * A045862 A045863 A045864

KEYWORD

nonn,base

AUTHOR

Jeff Burch

STATUS

approved

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Last modified December 4 22:42 EST 2021. Contains 349526 sequences. (Running on oeis4.)