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A117125
Positive integers that can be expressed as the difference between a factorial and a double factorial.
0
0, 1, 3, 4, 5, 9, 15, 16, 21, 22, 23, 72, 105, 112, 117, 118, 119, 336, 615, 672, 705, 712, 717, 718, 719, 1200, 4095, 4656, 4935, 4992, 5025, 5032, 5037, 5038, 5039
OFFSET
1,3
FORMULA
n! - m!! being n! > m!!
EXAMPLE
117 = 5! - 3!!
4992 = 7! - 6!!
CROSSREFS
Sequence in context: A356604 A050161 A195609 * A000692 A195971 A080552
KEYWORD
nonn
AUTHOR
STATUS
approved