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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