OFFSET
1,2
COMMENTS
The array A(row,col) is read by descending antidiagonals: A(1,1), A(1,2), A(2,1), A(1,3), A(2,2), A(3,1), etc.
Entries in column k are all multiples of A002110(k-1). Dividing that factor out gives array A286625. - Antti Karttunen, Jun 30 2017
LINKS
EXAMPLE
The top left corner of the array:
1, 2, 6, 30, 210, 2310, 30030, 510510
3, 8, 36, 240, 2520, 32340, 540540, 10210200
4, 12, 60, 420, 4620, 60060, 1021020, 19399380
5, 14, 66, 450, 4830, 62370, 1051050, 19909890
7, 32, 216, 2340, 30240, 512820, 9729720, 223603380
9, 38, 246, 2550, 32550, 542850, 10240230, 233303070
10, 42, 270, 2730, 34650, 570570, 10720710, 242492250
11, 44, 276, 2760, 34860, 572880, 10750740, 243002760
13, 62, 426, 4650, 60270, 1023330, 19429410, 446696250
15, 68, 456, 4860, 62580, 1053360, 19939920, 456395940
16, 72, 480, 5040, 64680, 1081080, 20420400, 465585120
17, 74, 486, 5070, 64890, 1083390, 20450430, 466095630
18, 90, 630, 6930, 90090, 1531530, 29099070, 669278610
PROG
CROSSREFS
KEYWORD
AUTHOR
Antti Karttunen, Sep 24 2016
STATUS
approved