id:A098206 - OEIS Search Results

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A first order iteration: n-th term is obtained from (n-1)-th by adding n-th prime and then multiplying by the n-th prime; initial value is 1.

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1, 12, 85, 644, 7205, 93834, 1595467, 30314234, 697227911, 20219610260, 626807919021, 23191893005146, 950867613212667, 40887307368146530, 1921703446302889119, 101850282654053126116, 6009166676589134444325 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`a[n]=(a[n-1]+p[n])*p[n], a[0]=1.`
	EXAMPLE	`n=4: a[4]=(a[3]+7)7=(85+7)7=644.`
	MATHEMATICA	`f[x_]:=(f[x-1]+Prime[x])*Prime[x]; f[1]=0; Table[f[w], {w, 1, 25}]`
	CROSSREFS	`Cf. A070826, A019461.` `Sequence in context: A003209 A155645 A095267 this_sequence A104911 A091119 A046023` `Adjacent sequences: A098203 A098204 A098205 this_sequence A098207 A098208 A098209`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Oct 19 2004`

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Last modified December 13 23:45 EST 2009. Contains 170824 sequences.

AT&T Labs Research