A115924 Numbers k such that k and 4*k, taken together, are pandigital.

15237, 17235, 17352, 20394, 20439, 21735, 23517, 23715

Offset: 1

Author

Giovanni Resta, Feb 06 2006

Keywords

• nonn
• base
• fini
• full

Examples

			15237 and 60948=15237*4 together contain all the 10 digits once.
		

Crossrefs

Cf. A054383, A115922, A115923, A115925, A114126, A115927.

Programs

Mathematica

Select[Range[10234,24987],Sort[Join[IntegerDigits[4 #],IntegerDigits[ #]]] == Range[0,9]&] (* Harvey P. Dale, Jun 01 2017 *)

PARI

{for(n=10234, 24987, #Set(digits(n))==5||next; #Set(digits(n*4))==5 && #Set(concat(digits(n), digits(n*4)))==10 && print1(n", "))} \\ M. F. Hasler, Feb 08 2014