querying multidimensional sequences in OEIS
Max A.
maxale at gmail.com
Fri Nov 3 21:26:20 CET 2006
On 11/3/06, Marc LeBrun <mlb at well.com> wrote:
> > Off hand, I can't think of any interesting functions of finite sequences of
> > positive integers that depend on the order of the sequence.
>
> Exponents in prime factorizations, say.
Oh, that is a very nice suggestion.
Are there any multidimensional sequences represented this way in OEIS?
I have a number of multidimensional sequences in mind that I'd like to
see in OEIS.
E.g.: the coefficients of incomplete Bell polynomials:
b( [k1, k2, ..., kn] ) = (k1 + 2*k2 + ... + n*kn)! / (k1! * k2! * ...
* kn!) / (1!^k1 * 2!^k2 * ... * n!^kn)
and looking similar the number of permutations with given cycle structure:
c( [k1, k2, ..., kn] ) = (k1 + 2*k2 + ... + n*kn)! / (k1! * k2! * ...
* kn!) / (1^k1 * 2^k2 * ... * n^kn)
Max
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