id:A140432 - OEIS Search Results

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

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1, 2, 3, 4, 5, 119, 14279, 203904119, 41576889949070279, 1728637777837101228675346430208119, 2988188566965591343823377482689473316222062058836342422720083726279 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`a(1)^2 + a(2)^2 + ... + a(70)^2 = a(1)a(2)...*a(70)`
	LINKS	`L. Kurlyandchik Problem M1523. Kvant 1995 (6), 23; Solution to M1523. Kvant 1996 (3), 24-25. (in Russian)`
	FORMULA	`For n>=6, a(n) = a(1)^2 + a(2)^2 + ... + a(n-1)^2 - n + 70.`
	CROSSREFS	`Cf. A005267.` `Sequence in context: A097931 A162225 A010348 this_sequence A004867 A073787 A037436` `Adjacent sequences: A140429 A140430 A140431 this_sequence A140433 A140434 A140435`
	KEYWORD	`nonn`
	AUTHOR	`Max Alekseyev (maxale(AT)gmail.com), Jun 19 2008`

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Last modified December 19 12:50 EST 2009. Contains 171053 sequences.

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