A083448 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.

0, 10, 117, 1210, 12225, 122736, 1229527, 12305358, 123093909, 12342050110, 1234527974211, 123456310099512, 12345672683090413, 1234567803832830114, 123456787793437763415, 12345678889188423253516

Offset

1,2

Links

Table of n, a(n) for n=1..16.

Formula

a(n) = A007908(n) - A000142(n). - David Wasserman, Nov 09 2004

Example

a(6) = 123456-720=122736.

Crossrefs

Sequence in context: A089833 A308667 A251318 * A024129 A262970 A309582

Adjacent sequences: A083445 A083446 A083447 * A083449 A083450 A083451

Keyword

base,easy,nonn

Author

Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 01 2003

Extensions

More terms from David Wasserman, Nov 09 2004

Status

approved