A167997 Numbers n with property that first digit of 4*n = last digit of n.

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

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