39156
domain: N
Appears in sequences
- a(n) is the concatenation of n and 4n.at n=38A019552
- Number of 3 X n (0,1) matrices such that each row and each column is nondecreasing or nonincreasing.at n=25A086113
- Number of 4-step one space leftwards or up, two space rightwards or down asymmetric rook's tours on an n X n board summed over all starting positions.at n=27A187299
- Expansion of Product_{k>=0} ((1+x^(4*k+1))/(1-x^(4*k+1)))^3.at n=21A261652
- Number of length-n 0..5 arrays with no repeated value differing from the previous repeated value by other than plus or minus one modulo 5+1.at n=5A269675
- T(n,k)=Number of length-n 0..k arrays with no repeated value differing from the previous repeated value by other than plus or minus one modulo k+1.at n=50A269678
- Number of length-6 0..n arrays with no repeated value differing from the previous repeated value by other than plus or minus one modulo n+1.at n=4A269681
- G.f.: Sum_{k>=0} x^(k*(k+1)/2) * Product_{j=1..k} 1/(1 - x^j)^3.at n=23A376707