id:A004788 - OEIS Search Results

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Number of distinct prime divisors of the numbers in row n of Pascal's triangle.

+0
2

0, 0, 1, 1, 2, 2, 3, 3, 3, 3, 4, 5, 5, 5, 5, 5, 6, 6, 7, 7, 7, 7, 8, 9, 8, 8, 8, 8, 9, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 12, 12, 12, 13, 13, 14, 13, 14, 15, 14, 14, 14, 14, 15, 15, 15, 16, 15, 15, 16, 17, 17, 17, 18, 17, 17, 17, 18, 18, 18, 19, 19, 20, 20, 20, 20, 20, 20, 20, 21, 22, 21 (list; graph; listen)

	OFFSET	`0,5`
	COMMENT	`Also the number of prime divisors of A002944[n]=LCM[C(n,j); j=0,...,Floor[n/2]]`
	CROSSREFS	`Sequence in context: A055656 A078571 A071860 this_sequence A034584 A035430 A167227` `Adjacent sequences: A004785 A004786 A004787 this_sequence A004789 A004790 A004791`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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