OFFSET
0,2
COMMENTS
See A365213 for the denominators.
LINKS
Rémy Sigrist, PARI program
FORMULA
T(n, k) = T(n, n - k).
T(n, 0) = 2^(n+1) - 1.
EXAMPLE
Triangle T(n, k) begins:
1
3 3
7 5 7
15 25 25 15
31 41 11 41 31
63 22 77 77 22 63
127 183 109 93 109 183 127
255 311 31 403 403 31 311 255
511 105 226 779 467 779 226 105 511
.
Triangle V(n, k) / V(0, 0) begins:
1
3 3
7 5 7
15 25/3 25/3 15
31 41/3 11 41/3 31
63 22 77/5 77/5 22 63
127 183/5 109/5 93/5 109/5 183/5 127
255 311/5 31 403/17 403/17 31 311/5 255
511 105 226/5 779/25 467/17 779/25 226/5 105 511
PROG
(PARI) \\ See Links section.
CROSSREFS
KEYWORD
AUTHOR
Rémy Sigrist, Aug 26 2023
STATUS
approved