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Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!) A217369 a(n) = (product of previous terms) * (sum of previous terms), with a(1)=1, a(2)=4. 0 1, 4, 20, 2000, 324000000, 16796264976000000000000 (list; graph; refs; listen; history; text; internal format) OFFSET 1,2 LINKS Table of n, a(n) for n=1..6. EXAMPLE a(3) = (1+4) * (1*4) = 5*4 = 20 CROSSREFS Sequence in context: A012841 A074195 A332867 * A146342 A103896 A244955 Adjacent sequences: A217366 A217367 A217368 * A217370 A217371 A217372 KEYWORD nonn AUTHOR Jon Perry, Oct 01 2012 STATUS approved

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Last modified August 31 00:13 EDT 2024. Contains 375550 sequences. (Running on oeis4.)