id:A091233 - OEIS Search Results

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(Largest Matula-Goebel number encoding a tree with n nodes) - (smallest Matula-Goebel number encoding a tree with n nodes).

+0
7

1, 1, 2, 4, 11, 53, 307, 2177, 19503, 219489, 3041937, 50727755, 997525229, 22742733167, 592821131015, 17461204518199 (list; graph; listen)

	OFFSET	`1,3`
	REFERENCES	`F. Goebel, On a 1-1-correspondence between rooted trees and natural numbers, J. Combin. Theory, B 29 (1980), 141-143.` `D. Matula, A natural rooted tree enumeration by prime factorization, SIAM Rev. 10 (1968).`
	LINKS	`A. Karttunen, Scheme-program for computing this sequence.`
	FORMULA	`a(n) = (A005518(n)-A005517(n))+1.`
	CROSSREFS	`Compare to A091241 and A000081. Cf. A061773.` `Adjacent sequences: A091230 A091231 A091232 this_sequence A091234 A091235 A091236` `Sequence in context: A096119 A117157 A057857 this_sequence A007903 A006894 A038093`
	KEYWORD	`nonn`
	AUTHOR	`Antti Karttunen (His-Firstname.His-Surname(AT)iki.fi), Jan 03 2004`

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