80640

Appears in sequences

• Number of subgroups L of Z^n with the property that for every a in Z^n there exists precisely one b in L with d(a,b) <= 1. Here d denotes Euclidean distance.at n=7A026739
• Expansion of (theta_3(z^4)^3 + theta_2(z^4)^3)^3.at n=34A028696
• Theta series of lattice D3 tensor D3 (dimension 9, det. 4096, min. norm 4).at n=17A033693
• Triangle giving number of labeled trees with n >= 3 nodes and diameter d >= 2.at n=19A034854
• a(n) = n!*(n-4)/2.at n=4A034865
• a(n) = n!*(n-4)/2, n > 4, and a(4) = 4.at n=4A034866
• Value of phi in arithmetic progression of at least 5 terms having the same value of phi in A050515.at n=0A050517
• Triangle read by rows: T(n,k) = number of paths of n upsteps U and n downsteps D that contain k UUDs.at n=32A051288
• a(n) = (2*n+4)!!/4!!, related to A000165 (even double factorials).at n=5A051578
• Triangle read by rows: T(n,k) = n!*k.at n=29A051683
• Expansion of e.g.f. (2 + x)/(1 - x^2).at n=8A052566
• E.g.f. (1-x)/(1-x-x^4).at n=8A052581
• Expansion of e.g.f. x^2*(1-x)/(1-2*x).at n=7A052587
• E.g.f. (1-x^3)/(1-x^2-x^3).at n=8A052607
• E.g.f. (2+x+x^2+x^3)/(1-x^4).at n=8A052621
• Expansion of e.g.f. (2+x^3-x^4)/(1-x).at n=8A052628
• Expansion of e.g.f. x^2*(2+x-x^2)/(1-x).at n=8A052642
• E.g.f. 2*x^2*(1+x-x^2)/(1-x).at n=8A052645
• Expansion of e.g.f. (1-x^2)/(1-x^2-x^3).at n=8A052679
• Expansion of e.g.f. 2*x^4/(1-x).at n=8A052683