id:A111236 - OEIS Search Results

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a(1)=a(2)=a(3)=a(4)=1. For n >= 5, a(n)= (a(n-1)+a(n-2)) * (a(n-3)+a(n-4)).

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1, 1, 1, 1, 4, 10, 28, 190, 3052, 123196, 27522064, 89625932920, 11318569384820032, 312907271203608153807520, 28053218967767813941001154374119168, 317524819653692484884273872549799784105586335582976 (list; graph; listen)

	OFFSET	`1,5`
	LINKS	`Leroy Quet, Home Page (listed in lieu of email address)`
	PROGRAM	`(PARI) a(n)=if(n<5, 1, (a(n-1)+a(n-2)) *(a(n-3)+a(n-4))) (Klasen)`
	CROSSREFS	`Sequence in context: A083587 A061639 A008995 this_sequence A164361 A006907 A052946` `Adjacent sequences: A111233 A111234 A111235 this_sequence A111237 A111238 A111239`
	KEYWORD	`easy,nonn`
	AUTHOR	`Leroy Quet Oct 28 2005`
	EXTENSIONS	`More terms from Lambert Klasen (lambert.klasen(AT)gmx.net), Oct 31 2005`

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.

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