id:A054092 - OEIS Search Results

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T(n,n), array T as in A054090.

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1, 1, 1, 3, 7, 25, 105, 547, 3367, 24033, 195169, 1777651, 17950551, 199059673, 2405063017, 31448531955, 442501797655, 6666753146497, 107081325959937, 1826636018849443, 32980276187719399, 628351055737088601 (list; graph; listen)

	OFFSET	`0,4`
	PROGRAM	`(PARI) {a(n)= local(A); if(n<3, n>=0, A=vector(n, i, 1); for(k=1, n-2, A[k+2]=(k-1)A[k+1]+ kA[k]+ 2); A[n])} /* Michael Somos Nov 19 2006 */`
	CROSSREFS	`Adjacent sequences: A054089 A054090 A054091 this_sequence A054093 A054094 A054095` `Sequence in context: A096579 A120540 A133206 this_sequence A096648 A019056 A065163`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified October 13 20:18 EDT 2008. Contains 145016 sequences.

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