id:A030494 - OEIS Search Results

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If n is even, 2(n/2+1)!-1; if n is odd, ((n+1)/2+1)!-1.

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1, 3, 5, 11, 23, 47, 119, 239, 719, 1439, 5039, 10079, 40319, 80639, 362879, 725759, 3628799, 7257599, 39916799, 79833599, 479001599, 958003199, 6227020799, 12454041599, 87178291199, 174356582399, 1307674367999, 2615348735999 (list; graph; listen)

	OFFSET	`1,2`
	CROSSREFS	`s(n)=s(n+1), where s=A030298.` `Sequence in context: A106086 A072828 A032803 this_sequence A084361 A077229 A018113` `Adjacent sequences: A030491 A030492 A030493 this_sequence A030495 A030496 A030497`
	KEYWORD	`nonn,easy`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`
	EXTENSIONS	`Better description and more terms from Erich Friedman (erich.friedman(AT)stetson.edu).`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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