OFFSET
1,1
COMMENTS
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
EXAMPLE
. n | p = A259730(n) | 2*p - 3 | 3*p - 2 | a(n)
. ----+----------------+---------+---------+--------
. 1 | 3 | 3 | 7 | 21
. 2 | 5 | 7 | 13 | 91
. 3 | 7 | 11 | 19 | 209
. 4 | 11 | 19 | 31 | 589
. 5 | 13 | 23 | 37 | 851
. 6 | 23 | 43 | 67 | 2881
. 7 | 37 | 71 | 109 | 7739
. 8 | 43 | 83 | 127 | 10541
. 9 | 53 | 103 | 157 | 16171
. 10 | 67 | 131 | 199 | 26069
. 11 | 71 | 139 | 211 | 29329
. 12 | 113 | 223 | 337 | 75151 .
MATHEMATICA
Select[Table[(2p-3)(3p-2), {p, Prime[Range[200]]}], PrimeOmega[#]==2&&SquareFreeQ[ #]&] (* Harvey P. Dale, Jul 20 2022 *)
PROG
(Haskell)
a259758 n = (2 * p - 3) * (3 * p - 2) where p = a259730 n
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Jul 05 2015
STATUS
approved