A113102 - OEIS

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A113102

Column 1 of triangle A113101.

1, 20, 894, 108292, 39188597, 45157269264, 172969059719500, 2268555493366383236, 104065414379018585400528, 16965802042440759287849083708, 9953305892540385313201626908460431 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	PROG	`(PARI) {a(n)=local(M=matrix(n+1, n+1)); for(r=1, n+1, for(c=1, r, M[r, c]=if(r==c, 1, if(c>1, (M^4)[r-1, c-1])+(M^4)[r-1, c]))); return(if(n<1, 0, (M^4)[n+1, 2]))}`
	CROSSREFS	`Cf. A113101.` `Sequence in context: A041760 A117798 A006424 * A066802 A066798 A072035` `Adjacent sequences: A113099 A113100 A113101 * A113103 A113104 A113105`
	KEYWORD	`nonn`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Oct 14 2005`

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Last modified February 14 17:27 EST 2012. Contains 205644 sequences.