id:A074364 - OEIS Search Results

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Semi-tribonacci numbers, from tribonacci by analogy with semi-fibonacci sequence.

+0
2

0, 1, 1, 2, 1, 4, 2, 7, 1, 10, 4, 15, 2, 21, 7, 30, 1, 38, 10, 49, 4, 63, 15, 82, 2, 99, 21, 122, 7, 150, 30, 187, 1, 218, 38, 257, 10, 305, 49, 364, 4, 417, 63, 484, 15, 562, 82, 659, 2, 743, 99, 844, 21, 964, 122, 1107, 7, 1236, 150, 1393, 30, 1573, 187, 1790, 1, 1978, 218 (list; graph; listen)

	OFFSET	`0,4`
	LINKS	`T. D. Noe, Table of n, a(n) for n = 0..10000` `M. J. Halm, Sequences`
	FORMULA	`a(0) = 0, a(1) = 1, a(2n) = a(n), a(2n+1) = a(2n)+a(2n-1)+a(2n-2)`
	EXAMPLE	`a(4)=1 because a(4/2)=a(2)=1.`
	CROSSREFS	`Cf. A030067, A000073.` `Adjacent sequences: A074361 A074362 A074363 this_sequence A074365 A074366 A074367` `Sequence in context: A161268 A007690 A143375 this_sequence A008796 A079966 A101707`
	KEYWORD	`nonn`
	AUTHOR	`Michael Joseph Halm (hierogamous(AT)lycos.com), Feb 13 2003`

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Last modified November 8 20:39 EST 2009. Contains 166234 sequences.

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