A248422 -id:A248422 - cp's OEIS frontend

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

Jacy Fang, Oct 05 2014

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

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

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

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

A249166 Odd integers concatenated with themselves.

Original entry on oeis.org

11, 33, 55, 77, 99, 1111, 1313, 1515, 1717, 1919, 2121, 2323, 2525, 2727, 2929, 3131, 3333, 3535, 3737, 3939, 4141, 4343, 4545, 4747, 4949, 5151, 5353, 5555, 5757, 5959, 6161, 6363, 6565, 6767, 6969, 7171, 7373, 7575, 7777, 7979, 8181, 8383, 8585, 8787

Offset: 1

M. F. Hasler, Oct 22 2014

Bisection (every other term) of A020338. See A248422 for the complement.

Cf. A020338, A248422.

[Seqint(Intseq(n) cat Intseq(n)): n in [1..99 by 2]]

PARI
```
a(n) = eval(Str(2*n-1,2*n-1))
```

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A248365 4n concatenated with itself.

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A249166 Odd integers concatenated with themselves.

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