25520
domain: N
Appears in sequences
- Expansion of Product_{m>=1} ((1+q^(2*m-1))/(1+q^(2*m)))^5.at n=29A029842
- Number of Young tableaux with n cells whose shape is symmetric.at n=13A067136
- Numbers k such that phi(k) + phi(k+1) = k.at n=17A067796
- Number of monic irreducible polynomials of degree n in GF(3)[x,y].at n=3A115461
- Number of monic irreducible polynomials of degree 3 in GF(3)[x1,...,xn].at n=1A115478
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 0), (0, -1, 0), (0, 1, -1), (1, 1, 1)}.at n=9A149425
- Duplicate of A115461.at n=3A152129
- a(n) = 16*n^2 - 2*n.at n=39A158058
- Expansion of Product_{k>=1} 1/(1 - k*x^(k^2))^k.at n=34A285243
- Number of ways to select 4 numbers from the set of the first n natural numbers avoiding 3-term arithmetic progressions.at n=27A300760