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A138902 a(n) = d!, where d is the number of digits in n. 4

%I #14 Sep 27 2023 14:34:55

%S 1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,

%T 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,

%U 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,6,6,6

%N a(n) = d!, where d is the number of digits in n.

%H James Spahlinger, <a href="/A138902/b138902.txt">Table of n, a(n) for n = 0..10000</a>

%F a(n) = A000142(A055642(n)). - _James Spahlinger_, Oct 09 2012

%o (Haskell) a138902 = a000142 . a055642 -- _James Spahlinger_, Oct 09 2012

%Y Different from A047726. Cf. A138908.

%K easy,nonn,base

%O 0,11

%A _Odimar Fabeny_, May 16 2008

%E Edited by _N. J. A. Sloane_, Sep 29 2011, at the suggestion of _Franklin T. Adams-Watters_

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Last modified August 28 01:15 EDT 2024. Contains 375477 sequences. (Running on oeis4.)