OFFSET
1,4
COMMENTS
Indices of zeros appear to be 2^k-1.
EXAMPLE
a(4) = 1*4*9*16 mod 1*3*6*10 = 576 mod 90 = 36.
PROG
(Python)
s=t=1
for n in range(1, 33):
s*=n*n
t*=n*(n+1)/2
print str(s%t)+', ',
CROSSREFS
KEYWORD
nonn
AUTHOR
Alex Ratushnyak, Dec 03 2013
STATUS
approved