A045861 Numbers whose square has initial digit '7'.

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

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