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%I #2 Mar 30 2012 17:33:54
%S 5,5,5,5,7,5,5,7,7,5,5,7,7,7,5,5,7,7,7,7,5,5,7,7,2,7,7,5,5,7,7,2,2,7,
%T 7,5,5,7,7,2,1,2,7,7,5,5,7,7,2,1,1,2,7,7,5,5,7,7,2,1,5,1,2,7,7,5,5,7,
%U 7,2,1,5,5,1,2,7,7,5
%N Triangle read by rows: row n lists the digits of A139258(n), the palindromic number formed from the reflected decimal expansion of Euler's constant (or Euler-Mascheroni constant) gamma.
%C Also, successive digits of A139258.
%e Triangle begins:
%e ....... 5
%e ...... 5,5
%e ..... 5,7,5
%e .... 5,7,7,5
%e ... 5,7,7,7,5
%Y Decimal expansion of gamma: A001620. Cf. A138068, A138070, A138072, A139258, A139260, A139261.
%K easy,nonn,tabl,base
%O 1,1
%A _Omar E. Pol_, May 01 2008