OFFSET
1,1
COMMENTS
LINKS
Alois P. Heinz, Antidiagonals n = 1..141, flattened
Eric Weisstein's World of Mathematics, Rhonda Number
EXAMPLE
A(1,2) = 855 is the first and smallest term of column k=2. The second composite number is A002808(2) = 6. 855 = (((3*6)+5)*6+4)*6+3 = 3543_6 = 3*3*5*19. And (3*5*4*3)/6 = A001414(855) = 3+3+5+19 = 30.
Square array A(n,k) begins:
: 10206, 855, 1836, 15540, 1568, 560, 11475, ...
: 11935, 1029, 6318, 21054, 2835, 800, 18655, ...
: 12150, 3813, 6622, 25331, 4752, 3993, 20565, ...
: 16031, 5577, 10530, 44360, 5265, 4425, 29631, ...
: 45030, 7040, 14500, 44660, 5439, 4602, 31725, ...
: 94185, 7304, 14739, 44733, 5664, 4888, 45387, ...
: 113022, 15104, 17655, 47652, 5824, 7315, 58404, ...
CROSSREFS
AUTHOR
Alois P. Heinz, Sep 05 2017
STATUS
approved