cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A071273 Concatenation of R(n) (A004086) and n, omitting leading 0's.

Original entry on oeis.org

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

Views

Author

Amarnath Murthy, Jun 07 2002

Keywords

Examples

			a(12) = 2112, a(1235) = 53211235
		

Crossrefs

Cf. A071274.

Programs

  • Mathematica
    Table[10^IntegerLength[n] IntegerReverse[n]+n,{n,40}] (* Harvey P. Dale, Mar 14 2023 *)