login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A167997 Numbers n with property that first digit of 4*n = last digit of n. 6
16, 31, 41, 52, 62, 72, 83, 93, 104, 114, 124, 125, 135, 145, 156, 166, 177, 187, 197, 208, 218, 229, 239, 249, 251, 261, 271, 281, 291, 301, 311, 321, 331, 341, 351, 361, 371, 381, 391, 401, 411, 421, 431, 441, 451, 461, 471, 481, 491, 502, 512, 522, 532 (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

4*16=64, 4*31=124, 4*41=164, 4*52=208, etc.

MATHEMATICA

Reap[Do[If[IntegerDigits[n][[ -1]]==IntegerDigits[4*n][[1]], Sow[n]], {n, 1000}]][[2, 1]]

Select[Range[100], Last[IntegerDigits[#]] == First[IntegerDigits[4 #]] &] (* G. C. Greubel, Jul 03 2016 *)

CROSSREFS

Cf. A167994, A167996.

Sequence in context: A221257 A194122 A257349 * A185979 A185980 A064816

Adjacent sequences:  A167994 A167995 A167996 * A167998 A167999 A168000

KEYWORD

base,nonn

AUTHOR

Zak Seidov, Nov 16 2009

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 15 03:16 EDT 2021. Contains 343909 sequences. (Running on oeis4.)