id:A121080 - OEIS Search Results

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Sum_{i=0..n} C(n,i)^2*i!*4^i + (1-2^n)*2^(n-1)*n!.

+0
2

1, 4, 37, 541, 10625, 258661, 7464625, 248318309, 9339986689, 391569431365, 18095180332721, 913513359466885, 50008961524486849, 2950209091316054309, 186558089772409191985, 12587159519294553302821, 902488447534988078746625, 68518909362619336345906309 (list; graph; listen)

	OFFSET	`0,2`
	REFERENCES	`Z. Li, Z. Li and Y. Cao, Enumeration of symplectic and orthogonal injective partial transformations, Discrete Math., 306 (2006), 1781-1787.`
	CROSSREFS	`Cf. A102773, A121079.` `Sequence in context: A133462 A123762 A070768 this_sequence A001518 A036245 A097998` `Adjacent sequences: A121077 A121078 A121079 this_sequence A121081 A121082 A121083`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Aug 11 2006`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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