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

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.

Sequence in context: A029516 A061833 A132285 * A296543 A152740 A080859

Adjacent sequences: A249163 A249164 A249165 * A249167 A249168 A249169

Keyword

nonn,base

Author

M. F. Hasler, Oct 22 2014

Status

approved