id:A066956 - OEIS Search Results

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a(n) = number of ways of placing '+' and '-' among the digits 123456789 so that the result of the expression is n, '-' before 1 not allowed.

+0
2

11, 26, 11, 18, 8, 21, 12, 17, 8, 22, 12, 21, 11, 16, 15, 20, 8, 17, 11, 20, 15, 16, 11, 23, 18, 13, 14, 21, 15, 19, 17, 14, 19, 19, 7, 14, 19, 19, 17, 18, 16, 17, 18, 10, 15, 26, 18, 15, 16, 12, 17, 19, 9, 17, 21, 16, 13, 14, 16, 17, 17, 11, 13, 22, 14, 13, 15, 15, 15, 17, 7 (list; graph; listen)

	OFFSET	`0,1`
	EXAMPLE	`a(4) = 8 because 4 = 12-34-56-7+89 = 12-3-4-5-6-7+8+9 = 12-3+45-67+8+9 = 12-3+4-5+6+7-8-9 = 12-3+4+5-6-7+8-9 = 12+3-4-5+6-7+8-9 = 12+3-4+5-6-7-8+9 = 1+2-34+5+6+7+8+9 and only for these`
	CROSSREFS	`Cf. A066957.` `Adjacent sequences: A066953 A066954 A066955 this_sequence A066957 A066958 A066959` `Sequence in context: A039337 A043160 A043940 this_sequence A137015 A002154 A035934`
	KEYWORD	`nice,nonn`
	AUTHOR	`Miklos SZABO (mike(AT)ludens.elte.hu), Feb 01 2002`

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Last modified May 16 01:24 EDT 2008. Contains 139630 sequences.

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