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

%S 5,5,7,5,7,7,5,7,7,2,5,7,7,2,1,5,7,7,2,1,5,5,7,7,2,1,5,6,5,7,7,2,1,5,

%T 6,6,5,7,7,2,1,5,6,6,4,5,7,7,2,1,5,6,6,4,9,5,7,7,2,1,5,6,6,4,9,0,5,7,

%U 7,2,1,5,6,6,4,9,0,1

%N Triangle read by rows: row n lists the first n digits of the decimal expansion of Euler's constant (or Euler-Mascheroni constant) gamma.

%C Also, successive digits of A139260.

%e Triangle begins:

%e ....... 5

%e ...... 5,7

%e ..... 5,7,7

%e .... 5,7,7,2

%e ... 5,7,7,2,1

%Y Decimal expansion of gamma: A001620. Cf. A138114, A138115, A138116, A139258, A139259, A139260.

%K easy,nonn,tabl,base

%O 1,1

%A _Omar E. Pol_, May 01 2008