id:A146323 - OEIS Search Results

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a(n)= integer part [ Sum_i=1..n (1/phi(i))]

+0
1

1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	Looking on the number of 1`s, 2`s,...k`s in this sequence we obtain the sequence (1,2,4,5,9,16,25,42,72,...). Lim_k-->oo [number of (k+1)`s / number of(k`s)] = sqrt(e).
	CROSSREFS	`Cf. A000010` `Sequence in context: A091194 A156079 A061555 this_sequence A071626 A106457 A103128` `Adjacent sequences: A146320 A146321 A146322 this_sequence A146324 A146325 A146326`
	KEYWORD	`nonn`
	AUTHOR	`Ctibor O. Zizka (c.zizka(AT)email.cz), Oct 30 2008`

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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.

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