id:A118623 - OEIS Search Results

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a(0) = 1, a(n+1) = a(n)^2 + number of divisors of a(n).

+0
1

1, 2, 6, 40, 1608, 2585680, 6685741062420, 44699133553728910336256592, 1998012540454093724746522398047564450017935663454544 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`a(n) = A000290(a(n-1)) + A000005(a(n-1).`
	LINKS	`Index entries for sequences of form a(n+1)=a(n)^2 + ...`
	CROSSREFS	`Cf. A007018.` `Sequence in context: A045846 A135755 A051185 this_sequence A000612 A096138 A004153` `Adjacent sequences: A118620 A118621 A118622 this_sequence A118624 A118625 A118626`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 09 2006`

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Last modified December 18 21:37 EST 2009. Contains 171024 sequences.