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Demlo Number

The initially Palindromic Numbers 1, 121, 12321, 1234321, 123454321, ... (Sloane's A002477). For the first through ninth terms, the sequence is given by the Generating Function


(Plouffe 1992, Sloane and Plouffe 1995). The definition of this sequence is slightly ambiguous from the tenth term on.

See also Consecutive Number Sequences, Palindromic Number


Kaprekar, D. R. ``On Wonderful Demlo Numbers.'' Math. Student 6, 68-70, 1938.

Plouffe, S. ``Approximations de Séries Génératrices et quelques conjectures.'' Montréal, Canada: Université du Québec à Montréal, Mémoire de Maîtrise, UQAM, 1992.

Sloane, N. J. A. Sequence A002477/M5386 in ``An On-Line Version of the Encyclopedia of Integer Sequences.'' and Sloane, N. J. A. and Plouffe, S. The Encyclopedia of Integer Sequences. San Diego: Academic Press, 1995.

© 1996-9 Eric W. Weisstein