OFFSET
0,3
EXAMPLE
Triangle T(n, k) starts:
[0] 1;
[1] 1, 2;
[2] 1, 3, 6;
[3] 1, 4, 12, 18;
[4] 1, 5, 20, 40, 60;
[5] 1, 6, 30, 75, 150, 200;
[6] 1, 7, 42, 126, 315, 525, 700;
[7] 1, 8, 56, 196, 588, 1176, 1960, 2450;
[8] 1, 9, 72, 288, 1008, 2352, 4704, 7056, 8820;
[9] 1, 10, 90, 405, 1620, 4320, 10080, 17640, 26460, 31752.
MAPLE
PROG
(Python)
from math import comb
def A360858_T(n, k): return comb(n, m:=k>>1)**2*(n+1)//(m+1 if k&1 else n+1-m) # Chai Wah Wu, Feb 28 2023
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Peter Luschny, Feb 28 2023
STATUS
approved