OFFSET
1,3
COMMENTS
a(n) is even for n > 1.
EXAMPLE
Triangle begins:
1;
0, 2;
2, 0, 2;
4, 0, 4, 0;
4, 4, 4, 2, 2;
0, 8, 0, 12, 0, 12;
10, 8, 10, 10, 8, 8, 10;
32, 0, 32, 0, 32, 0, 32, 0;
30, 28, 30, 28, 26, 30, 30, 26, 28;
0, 104, 0, 100, 0, 104, 0, 104, 0, 100;
PROG
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Seiichi Manyama, Dec 22 2021
STATUS
approved