A045857 Numbers whose square has initial digit '3'.

6, 18, 19, 55, 56, 57, 58, 59, 60, 61, 62, 63, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 548, 549, 550, 551, 552, 553, 554, 555, 556, 557, 558, 559, 560, 561, 562, 563

Offset

1,1

Links

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

Mathematica

Select[Range[600], IntegerDigits[#^2][[1]]==3&] (* Harvey P. Dale, Jan 09 2020 *)

Prog

(PARI) isok(n) = digits(n^2)[1] == 3; \\ Michel Marcus, May 28 2017

Crossrefs

Cf. A045786.

Sequence in context: A077630 A361730 A371989 * A074791 A093106 A234752

Adjacent sequences: A045854 A045855 A045856 * A045858 A045859 A045860

Keyword

nonn,base

Author

Jeff Burch

Status

approved