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Search: id:A036691
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| A036691 |
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Compositorial numbers: product of first n composite numbers. |
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+0
11
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| 1, 4, 24, 192, 1728, 17280, 207360, 2903040, 43545600, 696729600, 12541132800, 250822656000, 5267275776000, 115880067072000, 2781121609728000, 69528040243200000, 1807729046323200000, 48808684250726400000, 1366643159020339200000
(list; graph; listen)
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OFFSET
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0,2
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LINKS
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T. D. Noe, Table of n, a(n) for n=0..100
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EXAMPLE
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a(3)=c(1)*c(2)*c(3)=4*6*8=192.
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MATHEMATICA
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Composite[n_] := FixedPoint[n + PrimePi[ # ] + 1 &, n + PrimePi[n] + 1]; Table[ Product[ Composite[i], {i, 1, n}], {n, 0, 18}]
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CROSSREFS
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Cf. primorial numbers A002110. Distinct members of A049614. See also A049650, A060880.
Sequence in context: A001397 A001506 A088815 this_sequence A002866 A073840 A024249
Adjacent sequences: A036688 A036689 A036690 this_sequence A036692 A036693 A036694
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KEYWORD
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nice,nonn,easy
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AUTHOR
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Felice Russo (felice.russo(AT)katamail.com)
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EXTENSIONS
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Corrected and extended by Niklas Eriksen (f95-ner(AT)nada.kth.se) and njas.
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