A068221 - OEIS

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A068221

An auxiliary bit-mask sequence for computing A066425. (The "clean", symmetric one).

1, 3, 27, 6939, 1819024155, 4000076419257644882715, 77372730618755190082837640023742562619343248155, 237146729315719909074685533605289611245100501015339264129426202250460094330698830235303562543675218715 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	LINKS	`A. Karttunen, Scheme functions for computing A066425 and related sequences.`
	FORMULA	`a(1)=1, a(n) = ((2^(A068739(n-1)+A068059(n-1)-1))+1)*a(n-1)`
	CROSSREFS	`The corresponding "dirty" bit-mask sequence is A068222. This sequence in binary: A068223. The width of these bit-masks is given by A068739.` `Sequence in context: A170921 A122215 A122217 * A068222 A055777 A014222` `Adjacent sequences: A068218 A068219 A068220 * A068222 A068223 A068224`
	KEYWORD	`nonn`
	AUTHOR	`Antti Karttunen (firstname.surname ), Feb 26 2002`

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Last modified February 15 14:35 EST 2012. Contains 205820 sequences.