A071273 Concatenation of R(n) (A004086) and n, omitting leading 0's.
11, 22, 33, 44, 55, 66, 77, 88, 99, 110, 1111, 2112, 3113, 4114, 5115, 6116, 7117, 8118, 9119, 220, 1221, 2222, 3223, 4224, 5225, 6226, 7227, 8228, 9229, 330, 1331, 2332, 3333, 4334, 5335, 6336
Offset: 1
Examples
a(12) = 2112, a(1235) = 53211235
Crossrefs
Cf. A071274.
Programs
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Mathematica
Table[10^IntegerLength[n] IntegerReverse[n]+n,{n,40}] (* Harvey P. Dale, Mar 14 2023 *)