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Palindromes formed from the reflected decimal expansion of Euler's constant (or Euler-Mascheroni constant) gamma.
3

%I #2 Mar 30 2012 17:33:54

%S 5,55,575,5775,57775,577775,5772775,57722775,577212775,5772112775,

%T 57721512775,577215512775,5772156512775,57721566512775,

%U 577215666512775,5772156666512775,57721566466512775,577215664466512775

%N Palindromes formed from the reflected decimal expansion of Euler's constant (or Euler-Mascheroni constant) gamma.

%e n ... Successive digits of a(n)

%e 1 ............ ( 5 )

%e 2 ......... . ( 5 5 )

%e 3 .......... ( 5 7 5 )

%e 4 ......... ( 5 7 7 5 )

%e 5 ........ ( 5 7 7 7 5 )

%e 6 ....... ( 5 7 7 7 7 5 )

%e 7 ...... ( 5 7 7 2 7 7 5 )

%e 8 ..... ( 5 7 7 2 2 7 7 5 )

%e 9 .... ( 5 7 7 2 1 2 7 7 5 )

%e 10 .. ( 5 7 7 2 1 1 2 7 7 5 )

%Y Decimal expansion of gamma: A001620. Cf. A135634, A135697, A135700, A139259, A139260, A139261.

%K easy,nonn,base

%O 1,1

%A _Omar E. Pol_, May 01 2008