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A167996 Numbers n with property that first digit of 3*n = last digit of n. 7
13, 14, 28, 41, 51, 61, 72, 82, 92, 103, 113, 123, 133, 134, 144, 154, 164, 175, 185, 195, 206, 216, 226, 237, 247, 257, 268, 278, 288, 298, 309, 319, 329, 341, 351, 361, 371, 381, 391, 401, 411, 421, 431, 441, 451, 461, 471, 481, 491, 501, 511, 521, 531, 541 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

G. C. Greubel, Table of n, a(n) for n = 1..1000

EXAMPLE

3*13=39, 3*14=42, 3*28=84, 3*41=123, etc.

MATHEMATICA

Reap[Do[If[IntegerDigits[n][[ -1]]==IntegerDigits[3*n][[1]], Sow[n]], {n, 1000}]][[2, 1]]

Select[Range[600], Last[IntegerDigits[#]]==First[IntegerDigits[3#]]&] (* Harvey P. Dale, Jul 10 2013 *)

CROSSREFS

Cf. A167994.

Sequence in context: A041340 A041338 A042411 * A308122 A292116 A071870

Adjacent sequences:  A167993 A167994 A167995 * A167997 A167998 A167999

KEYWORD

base,nonn

AUTHOR

Zak Seidov, Nov 16 2009

STATUS

approved

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Last modified May 14 12:37 EDT 2021. Contains 343884 sequences. (Running on oeis4.)