1,1

Table of n, a(n) for n=1..11.

For example, the sum of the proper substrings of 891 is 8 + 9 + 1 + 89 + 91 = 198 and 198 reversed is the number itself.

5401 is included because 540+401+54+40+5+4+0+1 = 1045, which is 5401 backwards.

Sequence in context: A204366 A266915 A124666 * A087672 A083827 A268876

Adjacent sequences: A125300 A125301 A125302 * A125304 A125305 A125306

base,more,nonn

Tanya Khovanova, Dec 09 2006

More terms from Paul Richards, Sep 25 2007

a(7)-a(11) from Donovan Johnson, Nov 30 2008

approved