login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A093572 Greatest prime factor of Product(k+prime(k): 1<=k<=n). 4
3, 5, 5, 11, 11, 19, 19, 19, 19, 19, 19, 19, 19, 19, 31, 31, 31, 79, 79, 79, 79, 101, 101, 113, 113, 127, 127, 127, 127, 127, 127, 163, 163, 173, 173, 173, 173, 173, 173, 173, 173, 223, 223, 223, 223, 223, 223, 271, 271, 271, 271, 271, 271, 271, 271, 271, 271 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

a(n) = A006530(A093570(n)) = A006530(A093571(n));

a(n) = Max(A076556(k): 1<=k<=n).

MATHEMATICA

PrimeFactors[n_Integer] := Flatten[ Table[ # [[1]], {1}] & /@ FactorInteger[n]]; Table[ PrimeFactors[ Product[k + Prime[k], {k, n}]][[ -1]], {n, 60}] (from Robert G. Wilson v Apr 07 2004)

CROSSREFS

Cf. A014688, A092602.

Sequence in context: A155537 A164663 A098971 * A118132 A089167 A188345

Adjacent sequences:  A093569 A093570 A093571 * A093573 A093574 A093575

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Apr 01 2004

EXTENSIONS

More terms from Robert G. Wilson v (rgwv(AT)rgwv.com) Apr 07 2004

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 16 14:37 EST 2012. Contains 205930 sequences.