OFFSET
1,2
COMMENTS
The array is read by downwards antidiagonals as A(1,1), A(1,2), A(2,1), A(1,3), A(2,2), A(3,1), ...
See A257513.
LINKS
EXAMPLE
The top left corner of the array:
1, 2, 2, 4, 2, 4, 2, 4, 6, 2, 6, 4, 2, 4, 6
5, 16, 24, 72, 48, 120, 72, 168, 312, 120, 408, 312, 168, 360, 600
9, 20, 42, 66, 78, 102, 114, 230, 232, 248, 370, 246, 258, 470, 636
13, 34, 36, 96, 60, 144, 160, 162, 360, 198, 320, 336, 352, 494, 460
17, 38, 54, 90, 90, 194, 96, 262, 338, 144, 406, 434, 364, 330, 684
21, 52, 48, 120, 124, 150, 176, 240, 304, 210, 504, 458, 204, 526, 614
25, 56, 66, 158, 84, 226, 150, 210, 374, 280, 540, 318, 380, 456, 532
29, 70, 88, 138, 140, 216, 120, 264, 456, 292, 428, 490, 306, 378, 756
33, 74, 92, 190, 126, 198, 162, 326, 492, 180, 588, 432, 228, 574, 686
37, 88, 114, 192, 108, 240, 208, 350, 412, 308, 550, 366, 404, 504, 816
41, 92, 132, 186, 138, 290, 220, 282, 540, 258, 500, 538, 330, 614, 958
45, 106, 126, 216, 172, 314, 156, 382, 518, 204, 660, 480, 424, 732, 794
49, 110, 144, 254, 184, 270, 236, 360, 484, 332, 622, 578, 522, 576, 712
53, 124, 138, 306, 144, 346, 210, 330, 612, 282, 720, 684, 366, 498, 830
57, 128, 156, 300, 200, 336, 180, 430, 590, 352, 830, 552, 288, 600, 748
...
PROG
KEYWORD
nonn,tabl
AUTHOR
Antti Karttunen, May 01 2015
STATUS
approved