%I A135487
%S A135487 19,232,3690,72600,1705704,46650240,1456902720,51181804800,1998434592000,
%T A135487 85878536325120,4028521809312000,204866151025536000,11227636547487360000,
%U A135487 659746302934118400000,41380369671344191488000,2759500311807527608320000
%N A135487 (n^2+5*n+5)*(2*n+2)!/(n+4)!.
%D A135487 V. I. Arnold, Smooth function statistics, Funct. Anal. Other. Math., 
               1 (2006), 111-118.
%H A135487 <a href="Sindx_Do.html#repeat">Index entries for doubling substrings</
               a>
%Y A135487 Cf. A120420.
%Y A135487 Sequence in context: A125431 A104116 A028026 this_sequence A025965 A025960 
               A152494
%Y A135487 Adjacent sequences: A135484 A135485 A135486 this_sequence A135488 A135489 
               A135490
%K A135487 nonn
%O A135487 2,1
%A A135487 N. J. A. Sloane (njas(AT)research.att.com), Feb 21 2008