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A045857 Numbers whose square has initial digit '3'. 2
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 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
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: A223218 A077630 A361730 * A074791 A093106 A234752
KEYWORD
nonn,base
AUTHOR
STATUS
approved

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Last modified April 13 02:05 EDT 2024. Contains 371639 sequences. (Running on oeis4.)