id:A036609 - OEIS Search Results

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Number of 4-ary rooted trees with n nodes and height at most 4.

+0
1

1, 1, 1, 2, 4, 8, 14, 26, 44, 76, 125, 206, 327, 521, 802, 1231, 1845, 2742, 3987, 5748, 8124, 11364, 15615, 21212, 28336, 37412, 48597, 62368, 78810, 98359, 120910, 146797, 175601, 207443, 241515, 277666, 314674, 352152, 388503 (list; graph; listen)

	OFFSET	`0,4`
	LINKS	`E. M. Rains and N. J. A. Sloane, On Cayley's Enumeration of Alkanes (or 4-Valent Trees), J. Integer Sequences, Vol. 2 (1999), Article 99.1.1.` `Index entries for sequences related to rooted trees`
	CROSSREFS	`Adjacent sequences: A036606 A036607 A036608 this_sequence A036610 A036611 A036612` `Sequence in context: A020956 A065492 A006777 this_sequence A027557 A120545 A130708`
	KEYWORD	`nonn,fini`
	AUTHOR	`njas`

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Last modified May 16 23:01 EDT 2008. Contains 139884 sequences.

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