Search: a257891 -id:a257891
|
| |
|
|
A046301
|
|
Product of 3 successive primes.
|
|
+10
28
|
|
|
|
30, 105, 385, 1001, 2431, 4199, 7429, 12673, 20677, 33263, 47027, 65231, 82861, 107113, 146969, 190747, 241133, 290177, 347261, 409457, 478661, 583573, 716539, 871933, 1009091, 1113121, 1201289, 1317919, 1564259, 1879981, 2279269, 2494633, 2837407, 3127361, 3532343
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
LINKS
|
|
|
|
FORMULA
|
|
|
|
EXAMPLE
|
a(2) = 105 is in the sequence because 105 = 3* 5 * 7, product of three successive primes.
a(3) = 385 is in the sequence because 385 = 5 * 7 * 11, product of three successive primes.
(End)
|
|
|
MAPLE
|
|
|
|
MATHEMATICA
|
Table[Prime[n] Prime[n+1] Prime[n+2], {n, 50}] (* K. D. Bajpai, Aug 27 2014 *)
Times@@@Partition[Prime[Range[40]], 3, 1] (* Harvey P. Dale, Mar 25 2019 *)
|
|
|
PROG
|
(Magma) [NthPrime(n)*NthPrime(n+1)*NthPrime(n+2): n in [1..31]]; /* Or: */ [&*[ NthPrime(n+k): k in [0..2] ]: n in [1..31] ]; // Bruno Berselli, Feb 25 2011
(PARI) a(n)=prime(n)*prime(n+1)*prime(n+2); \\ Joerg Arndt, Aug 30 2014
(Haskell)
a046301 n = a046301_list !! (n-1)
a046301_list = zipWith3 (((*) .) . (*))
a000040_list (tail a000040_list) (drop 2 a000040_list)
|
|
|
CROSSREFS
|
|
|
|
KEYWORD
|
nonn,easy
|
|
|
AUTHOR
|
|
|
|
EXTENSIONS
|
|
|
|
STATUS
|
approved
|
| |
|
Search completed in 0.005 seconds
|
