305124019200
domain: N
Appears in sequences
- E.g.f. (1-x)/(1-x-x^3-x^4+x^5).at n=13A052651
- Number of adjacent pairs of form (even,odd) among all permutations of {1,2,...,n}. Also, number of adjacent pairs of form (odd,even).at n=13A077613
- Number of even entries that are followed by a smaller entry in all permutations of {1,2,...,n}.at n=13A145889