A249166 - OEIS

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A249166

Odd integers concatenated with themselves.

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

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OFFSET

1,1

COMMENTS

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

LINKS

Table of n, a(n) for n=1..44.

PROG

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

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

CROSSREFS

Cf. A020338, A248422.