OFFSET
2,1
COMMENTS
a(6) <= 110880 = 2*3*6*10*14*22 = 4*5*7*8*9*11.
LINKS
Zhao Hui Du, Table of n, a(n) for n = 2..25
FORMULA
A070824(a(n)) >= 2*n.
EXAMPLE
a(2) = 12 = 2*6 = 3*4,
a(3) = 120 = 2*3*20 = 4*5*6,
a(4) = 720 = 2*4*9*10 = 3*5*6*8,
a(5) = 10080 = 2*3*6*10*28 = 4*5*7*8*9.
a(6) = 110880 = 2*3*6*10*14*22 = 4*5*7*8*9*11.
a(7) = 1814400 = 2*3*4*14*15*18*20 = 5*6*7*8*9*10*12.
CROSSREFS
KEYWORD
nonn,hard
AUTHOR
Hugo Pfoertner, Jun 03 2022
EXTENSIONS
a(6) confirmed by and a(7)-a(13) from David A. Corneth, Jun 04 2022
a(14) onwards from Zhao Hui Du, May 12 2024
STATUS
approved