id:A137905 - OEIS Search Results

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Numbers that appear as binomial coefficients exactly twice.

+0
4

3, 4, 5, 7, 8, 9, 11, 12, 13, 14, 16, 17, 18, 19, 22, 23, 24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 37, 38, 39, 40, 41, 42, 43, 44, 46, 47, 48, 49, 50, 51, 52, 53, 54, 57, 58, 59, 60, 61, 62, 63, 64, 65, 67, 68, 69, 71, 72, 73, 74, 75, 76, 77, 79, 80, 81, 82, 83, 85, 86, 87, 88 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Complement of A006987; a(n) = A058084(a(n)). [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Mar 20 2009]`
	EXAMPLE	`7 is a member because 7 = binomial(7, 1) = binomial(7, 6).`
	CROSSREFS	`Cf. A098564, A098566.` `Sequence in context: A051374 A116590 A024355 this_sequence A074227 A122906 A042965` `Adjacent sequences: A137902 A137903 A137904 this_sequence A137906 A137907 A137908`
	KEYWORD	`easy,nonn`
	AUTHOR	`David Wasserman (dwasserm(AT)earthlink.net), Feb 21 2008`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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