id:A136527 - OEIS Search Results

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Triangle read by rows: T(n,k) = greatest common divisor of n-th and k-th composite number, 1<=k<=n.

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3

4, 2, 6, 4, 2, 8, 1, 3, 1, 9, 2, 2, 2, 1, 10, 4, 6, 4, 3, 2, 12, 2, 2, 2, 1, 2, 2, 14, 1, 3, 1, 3, 5, 3, 1, 15, 4, 2, 8, 1, 2, 4, 2, 1, 16, 2, 6, 2, 9, 2, 6, 2, 3, 2, 18, 4, 2, 4, 1, 10, 4, 2, 5, 4, 2, 20, 1, 3, 1, 3, 1, 3, 7, 3, 1, 3, 1, 21, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 1, 22, 4, 6, 8, 3, 2, 12, 2, 3, 8, 6 (list; table; graph; listen)

	OFFSET	`1,1`
	COMMENT	`T(n,k) = A050873(A002808(n),A002808(k));` `A073783(n) = T(n-1,n) for n>1;` `A002808(n) = T(n,n).`
	CROSSREFS	`Sequence in context: A097467 A092205 A059853 this_sequence A138614 A161912 A162339` `Adjacent sequences: A136524 A136525 A136526 this_sequence A136528 A136529 A136530`
	KEYWORD	`nonn,tabl`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jan 03 2008`

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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.

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