A136577 - OEIS

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A136577

Conjectured Hankel transform of A136576(n+1).

1, 1, 0, -16, -256, -4096, 0, 16777216, 4294967296, 1099511627776, 0, -1152921504606846976, -4722366482869645213696, -19342813113834066795298816, 0, 5192296858534827628530496329220096, 340282366920938463463374607431768211456 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,4`
	COMMENTS	`a(n+1) is the Hankel transform of A086616. [From Paul Barry (pbarry(AT)wit.ie), Jun 03 2009]`
	FORMULA	`a(n)=4^floor(n^2/2)((1/2-sqrt(2)/2)cos(3pin/4)+(1/2+sqrt(2)/2)cos(pin/4));`
	CROSSREFS	`Sequence in context: A206791 A206840 A171290 * A190134 A001025 A144318` `Adjacent sequences: A136574 A136575 A136576 * A136578 A136579 A136580`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jan 08 2008`

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Last modified February 17 00:09 EST 2012. Contains 205978 sequences.