2099200

Appears in sequences

• Numbers that are the sum of 4 nonzero 10th powers.at n=27A004804
• Number of types of Boolean functions of n variables under a certain group.at n=10A028403
• Number of reversible strings with n beads of 4 colors.at n=11A032121
• Numbers k such that (k+3)^(k+2) mod (k+1) = k.at n=21A064935
• Sum of coefficients of (x1)^(2i(1))*(x2)^(2i(2))*(x3)^(2i(3))*(x4)^(2i(4)) for {(i1),(i2),(i3),(i4)}=0,1,2,... : sum(i)=2n in the expansion of (x1+x2+x3+x4)^(2n) where n >= 1.at n=5A075878
• Number of n X n circulant singular matrices over GF(2).at n=21A086324
• Number of closed walks of length 2*n on the 4-cube.at n=6A092812
• Triangle P, read by rows, that satisfies [P^4](n,k) = P(n+1,k+1) for n>=k>=0, also [P^(4*m)](n,k) = [P^m](n+1,k+1) for all m, where [P^m](n,k) denotes the element at row n, column k, of the matrix power m of P, with P(k,k)=1 and P(k+1,1)=P(k+1,0) for k>=0.at n=33A111845
• Triangle read by rows: coefficient of x^n in the Taylor expansion of x/(1 - m*x - x^4) in row n, column m=1..n+2.at n=52A117742
• a(n) = n^6*(n^5 + 1)/2.at n=4A168627
• Number of length n+2 0..1 arrays with the sum of the maximum minus twice the median plus the minimum of adjacent triples multiplied by some arrangement of +-1 equal to zero.at n=19A251421
• Number of length n+2 0..1 arrays with the sum of medians of adjacent triples multiplied by some arrangement of +-1 equal to zero.at n=19A253122
• Number of set partitions of [n] such that the difference between each element and its index (in the partition) is a multiple of ten.at n=22A274867
• Array read by antidiagonals: A(n, L) is the number of closed walks of length 2L along the edges of an n-cube based at a vertex, for n >= 1 and L >= 1.at n=39A286899
• A(n, k) = (m*k)! [x^k] MittagLefflerE(m, x)^n, for m = 2, n >= 0, k >= 0; square array read by descending antidiagonals.at n=59A326476
• Dirichlet g.f.: Product_{k>=2} 1 / (1 - k^(-s))^(2^(k - 1)).at n=21A329800
• Dirichlet g.f.: Product_{k>=2} (1 + k^(-s))^(2^(k-1)).at n=21A344265
• Cogrowth sequence of the 16-element group C4:C4 = <S,T | S^4, T^4, STST^3>.at n=12A377855
• Cogrowth sequence of the 16-element quasihedral group SD16 = <S,T | S^8, T^2, STS^5T>.at n=12A377885
• Cogrowth sequence of the 16-element dicyclic group Q16 = <S,T | S^8, T^4, (ST)^4, TST^3S>.at n=12A377944