A139142 - OEIS

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A139142

This sequence and A139143 are complements. a(1)=1. A139143(1)=2. a(n+1) = a(n) + sum{k=1 to n} A139143(k).

1, 3, 9, 20, 37, 61, 93, 135, 188, 253, 331 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	EXAMPLE	`A139143 consists of all positive integers not in A139142 and vice versa.` `A specific example: a(5) = a(4) + sum{k=1 to 4} A139143(k) = 20 + 2+4+5+6 = 37.`
	CROSSREFS	`Cf. A139143.` `Sequence in context: A174866 A187409 A037048 * A037257 A145068 A192951` `Adjacent sequences: A139139 A139140 A139141 * A139143 A139144 A139145`
	KEYWORD	`more,nonn`
	AUTHOR	`Leroy Quet Apr 10 2008`

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Last modified February 15 09:26 EST 2012. Contains 205753 sequences.