OFFSET
2,1
COMMENTS
Each row has d(n)-1 terms, where d(n) is the number of positive divisors of n. The first row listed is row 2.
LINKS
Diana Mecum, Table of n, a(n) for n = 2..6070
EXAMPLE
The positive divisors of 20 are 1,2,4,5,10,20; lcm(1,2)=2, lcm(2,4)=4, lcm(4,5)=20, lcm(5,10)=10, and lcm(10,20)=20, so row 20 is (2,4,20,10,20).
Irregular array begins:
2;
3;
2, 4;
5;
2, 6, 6;
7;
2, 4, 8;
3, 9;
2, 10, 10;
11;
2, 6, 12, 12, 12;
...
MATHEMATICA
Flatten[Table[LCM@@@(Partition[Divisors[n], 2, 1]), {n, 2, 35}]] (* Harvey P. Dale, Apr 22 2011 *)
PROG
(PARI) tabf(nn) = {for (n=2, nn, d = divisors(n); for (k=2, #d, print1(lcm(d[k-1], d[k]), ", "); ); print; ); } \\ Michel Marcus, Mar 13 2018
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Leroy Quet, Dec 19 2007
EXTENSIONS
a(24)-a(85) from Diana L. Mecum, Dec 29 2008
STATUS
approved