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A145119
a(n) = Product_{k=1..n-1} (ceiling(n/k) - ceiling(n/k) mod 2).
0
1, 2, 4, 16, 32, 96, 384, 1024, 2048, 10240, 30720, 73728, 294912, 688128, 1835008, 12582912, 25165824, 56623104, 283115520, 629145600, 1887436800, 11072962560, 26575110144, 57982058496, 231928233984, 753766760448, 1758789107712
OFFSET
1,2
COMMENTS
Bounded by A010786 and A131385.
Each term has many more factors of two than any other prime factor.
PROG
(PARI) a(n) = prod(k=1, n-1, ceil(n/k) - ceil(n/k) % 2); \\ Michel Marcus, Nov 17 2019
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Reikku Kulon, Oct 02 2008
STATUS
approved