A083448 - OEIS

%I #6 Aug 23 2014 15:16:02

%S 0,10,117,1210,12225,122736,1229527,12305358,123093909,12342050110,

%T 1234527974211,123456310099512,12345672683090413,1234567803832830114,

%U 123456787793437763415,12345678889188423253516

%N Concatenation of first n numbers - n!. a(n) = 1234567891011... up to n - 1*2*3*4*5*6*7*8*9*10*11... up to n.

%F a(n) = A007908(n) - A000142(n). - _David Wasserman_, Nov 09 2004

%e a(6) = 123456-720=122736.

%K base,easy,nonn

%O 1,2

%A _Amarnath Murthy_ and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 01 2003

%E More terms from _David Wasserman_, Nov 09 2004