A248365 4n concatenated with itself.

44, 88, 1212, 1616, 2020, 2424, 2828, 3232, 3636, 4040, 4444, 4848, 5252, 5656, 6060, 6464, 6868, 7272, 7676, 8080, 8484, 8888, 9292, 9696, 100100, 104104, 108108, 112112, 116116, 120120, 124124, 128128, 132132, 136136, 140140, 144144, 148148, 152152, 156156

Offset: 1

Author

Jacy Fang, Oct 05 2014

Keywords

• nonn
• base
• easy

Links

• Michael De Vlieger, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A020338 (n), A248038 (3n), A248422 (2n).

Programs

Mathematica

a248038[n_Integer] := Module[{m, t}, m := ToString[4 n ]; ToExpression[m <> m]]; a248038 /@ Range[50]; (* Michael De Vlieger, Nov 06 2014 *)

Python

{print(str(4*n)*2,end=', ') for n in range(1,50)} # Derek Orr, Oct 05 2014