Sweet!
The mathematician's numerology: What's special about this number? (link from
b_v_borgia)
A few gems:
93 = 333 in base 5.
111 is the smallest possible magic constant of a 3 x 3 magic square of distinct primes.
145 = 1! + 4! + 5!
197 is a Keith number.
226 is the first number he doesn't have anything for.
384 = 8!!
666 is a palindromic triangular number.
668 is the number of legal pawn moves in chess.
The mathematician's numerology: What's special about this number? (link from
b_v_borgia)A few gems:
93 = 333 in base 5.
111 is the smallest possible magic constant of a 3 x 3 magic square of distinct primes.
145 = 1! + 4! + 5!
197 is a Keith number.
226 is the first number he doesn't have anything for.
384 = 8!!
666 is a palindromic triangular number.
668 is the number of legal pawn moves in chess.
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Comments
What does that mean?
I don't know, and the only definition I've found online (a number containing all ten digits) obviously doesn't apply to this. 'Tis indeed - er, curious.
Also, what does "8!!" mean?
http://mathworld.wolfram.com/DoubleFactorial.html
8!! ≠ (8!)! as I was originally assuming.
for positive, even integers, it is
n!! = n×(n-2)×(n-4)×...×6×4×2
for positive, odd integers, it is
n!! = n×(n-2)×(n-4)×...×5×3×1
Thus 8!! = 8×6×4×2 = 384
I'm clearly a little bit odd.