id:A060656 - OEIS Search Results

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a(n)=2a(n-1)*a(n-2)/a(n-3) with a(0)=a(1)=1.

+0
3

1, 1, 2, 4, 16, 64, 512, 4096, 65536, 1048576, 33554432, 1073741824, 68719476736, 4398046511104, 562949953421312, 72057594037927936, 18446744073709551616, 4722366482869645213696, 2417851639229258349412352 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`a(n+1) is the Hankel transform of A135052. - Paul Barry (pbarry(AT)wit.ie), Nov 15 2007`
	FORMULA	`a(n) =2^[ n^2/4 ] =a(n-1)2^[ n/2 ] =a(n-2)2^(n-1) =a(n-1)*A016116(n) =2^A002620(n).`
	EXAMPLE	`a(6)=26416/4=512.`
	CROSSREFS	`Cf. A038754.` `Cf. A002416.` `Sequence in context: A001900 A113247 A138870 this_sequence A061286 A019279 A061652` `Adjacent sequences: A060653 A060654 A060655 this_sequence A060657 A060658 A060659`
	KEYWORD	`easy,nonn`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), Apr 18 2001`

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Last modified September 6 00:03 EDT 2008. Contains 143485 sequences.

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