348713164800
domain: N
Appears in sequences
- Bishops on an n X n board (see Robinson paper for details).at n=27A005633
- a(0) = 0, a(n) = 4*n! for n > 0.at n=14A052578
- E.g.f. 1/((1-x)(1-x^4)).at n=14A052614
- Expansion of e.g.f. 1/((1-x)^2*(1-x^2)).at n=13A052618
- a(n) = (n^2-1)*n!/3.at n=12A090672
- E.g.f.: x/(1+x-x^3).at n=14A109581
- a(1)=1. a(n+1) = n!/lcm(a(1),a(2),...,a(n)).at n=28A131120
- Number of runs of even entries in all permutations of {1,2,...,n} (the permutation 274831659 has 3 runs of even entries: 2, 48 and 6).at n=12A152668
- Number of permutations of [n] starting and ending with an odd number.at n=15A199495
- a(n) = (n - 1)! * d(n), where d(n) = number of divisors of n (A000005).at n=14A318249
- Number of ways to fill a matrix with the first n positive integers.at n=14A323295
- Expansion of e.g.f. log(1 + x / (1 - x)^2).at n=15A328054
- Expansion of e.g.f. log(Product_{k>0} (1 + x^k)^(1/k)).at n=14A338814