

A192253


1sequence of reduction of (n!) by x^2 > x+1.


2



0, 1, 3, 15, 87, 687, 6447, 71967, 918687, 13256607, 212840607, 3765435807, 72741666207, 1523637512607, 34389853295007, 832071217775007, 21482864837231007, 589515687506543007, 17133249343107695007, 525731414152434287007, 16984313499467403887007
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OFFSET

1,3


COMMENTS

See A192232 for definition of "ksequence of reduction of [sequence] by [substitution]". After the tenth term, the final digit is 7, for terms in both A192253 and A192252. After the 100th term, the final 6 digits of terms in A192253 are 5,6,7,0,0,7.


LINKS

Table of n, a(n) for n=1..21.


FORMULA

Conjecture: a(n) n*a(n1) (n1)*(n3)*a(n2) +(n1)*(n2)*a(n3)=0.  R. J. Mathar, May 04 2014


MATHEMATICA

(See A192252.)


CROSSREFS

Cf. A192252, A192232.
Sequence in context: A132371 A192989 A316666 * A127785 A287511 A231257
Adjacent sequences: A192250 A192251 A192252 * A192254 A192255 A192256


KEYWORD

nonn


AUTHOR

Clark Kimberling, Jun 27 2011


STATUS

approved



