id:A117531 - OEIS Search Results

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Number of primes in the n-th row of the triangle in A117530.

+0
5

1, 2, 3, 3, 5, 3, 7, 3, 5, 6, 6, 6, 13, 3, 11, 8, 12, 8, 13, 10, 8, 7, 12, 10, 9, 21, 6, 22, 11, 7, 13, 12, 21, 13, 14, 16, 18, 7, 20, 17, 21, 20, 24, 14, 18, 20, 16, 16, 35, 10, 18, 29, 18, 30, 30, 26, 21, 18, 21, 29, 16, 22, 32, 40, 10, 27, 24, 25, 45, 18, 39, 40, 43, 11, 11 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`1 <= a(n) <= n; conjecture: a(n) < n for n>13.`
	FORMULA	`a(n) = Sum(A010051(A117530(n,k)): 1 <= k <= n).`
	CROSSREFS	`Sequence in context: A071049 A140187 A111607 this_sequence A105555 A066858 A152864` `Adjacent sequences: A117528 A117529 A117530 this_sequence A117532 A117533 A117534`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Mar 25 2006`

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Last modified December 20 13:54 EST 2009. Contains 171081 sequences.

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