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Search: id:A074480
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A074480 Multiplicative closure of twin prime pair products (A037074). +0
4
1, 15, 35, 143, 225, 323, 525, 899, 1225, 1763, 2145, 3375, 3599, 4845, 5005, 5183, 7875, 10403, 11305, 11663, 13485, 18375, 19043, 20449, 22499, 26445, 31465, 32175, 32399, 36863, 39203, 42875, 46189, 50625, 51983, 53985, 57599, 61705 (list; graph; listen)
OFFSET

1,2
COMMENT

A072965(a(n)) = 1.

EXAMPLE

a(99)=1040399=1019*1021; a(101)=1090125=(3*5)*(3*5)*(3*5)*(17*19); a(103)=1101275=(5*7)*(5*7)*(29*31); a(105)=1126125= (3*5)*(3*5)*(5*7)*(11*13).

CROSSREFS

Cf. A037074, A001359, A006512, A062505.

Sequence in context: A109068 A061367 A070161 this_sequence A037074 A107423 A027442

Adjacent sequences: A074477 A074478 A074479 this_sequence A074481 A074482 A074483

KEYWORD

nonn,nice

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Aug 23 2002

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Last modified September 4 21:24 EDT 2008. Contains 143414 sequences.

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