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

1,1

Links

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

Mathematica

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

Prog

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

Crossrefs

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

Sequence in context: A335481 A345409 A246412 * A044182 A044563 A129289

Adjacent sequences: A248362 A248363 A248364 * A248366 A248367 A248368

Keyword

nonn,base,easy

Author

Jacy Fang, Oct 05 2014

Status

approved