Hardy, G. H. A mathematician’s apology. (English) Zbl 0025.19301 Cambridge: Univ. Press. VII, 94 p. (1940). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 8 ReviewsCited in 31 Documents Keywords:Philosophy, logic PDFBibTeX XML Online Encyclopedia of Integer Sequences: Number of n-digit numbers N that do not end with 0 and are such that the reversal of N divides N but is different from N.