id:A147795 - OEIS Search Results

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If n=A000695(k_n)+2A000695(l_n), then a(n) is the number of nonnegative integers m<n such that k_m differs from k_n and l_m differs from l_n

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0, 0, 1, 1, 2, 2, 3, 3, 6, 6, 7, 7, 8, 8, 9, 9, 12, 12, 13, 13, 14, 14, 15, 15, 18, 18, 19, 19, 20, 20, 21, 21, 28, 28, 29, 29, 30, 30, 31, 31, 34, 34, 35, 35, 36, 36 (list; graph; listen)

	OFFSET	`0,5`
	COMMENT	`Let us call integers m and n collinear one to another if either A059905(m)=A059905(n) or A059906(m)=A059906(n). Then a(n) is the number of noncollinear to n nonnegative integers not exceeding n.`
	FORMULA	`Theorem. a(2n)=a(2n+1)`
	CROSSREFS	`A000695 A059905 A059906` `Sequence in context: A145787 A096111 A101081 this_sequence A038716 A035642 A133392` `Adjacent sequences: A147792 A147793 A147794 this_sequence A147796 A147797 A147798`
	KEYWORD	`nonn`
	AUTHOR	`Vladimir Shevelev (shevelev(AT)bgu.ac.il), Nov 13 2008`

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

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