127008

Appears in sequences

• Expansion of 1/((1-3*x)*(1-5*x)*(1-8*x)).at n=5A017521
• Number of labeled pure 2-complexes on n nodes (0-simplexes) with 5 2-simplexes and 10 1-simplexes.at n=3A054557
• Sum of divisors of central binomial coefficient binomial(n, floor(n/2)).at n=17A064139
• Duplicate of A067819.at n=8A066972
• Sum of the divisors of binomial(2n,n).at n=8A067819
• Numbers n such that n*phi(n-1) is a perfect square.at n=36A069069
• a(n) = 15n^2 + 13n^3.at n=21A085377
• a(n) = (n+1)*(2n+1)^2.at n=31A139757
• Partition number array, called M31hat(6).at n=47A145356
• Number of permutations of floor(i*9/8), i=0..n-1, with all sums of 2 through 4 adjacent terms respectively unique.at n=9A147907
• Number of permutations of floor(i*9/8), i=0..n-1, with all sums of 2 through 5 adjacent terms respectively unique.at n=9A147916
• Number of 2-step self-avoiding walks on an n X n X n cube summed over all starting positions.at n=27A187163
• Norm of coefficients in g.f. C(x) that satisfies: C(x) = 1 + x/C(I*x).at n=23A193384
• Number of nX4 0..3 arrays with no element equal to another within two positions in the same row or column, and new values 0..3 introduced in row major order.at n=6A206688
• Number of nX7 0..3 arrays with no element equal to another within two positions in the same row or column, and new values 0..3 introduced in row major order.at n=3A206691
• T(n,k)=Number of nXk 0..3 arrays with no element equal to another within two positions in the same row or column, and new values 0..3 introduced in row major order.at n=48A206692
• T(n,k)=Number of nXk 0..3 arrays with no element equal to another within two positions in the same row or column, and new values 0..3 introduced in row major order.at n=51A206692
• Numbers whose square is both a sum and a difference of two positive cubes.at n=25A230716
• a(n) = Sum_{0 < x,y,z <= n and gcd(x^2 + y^2 + z^2, n)=1} gcd(x^2 + y^2 + z^2 - 1, n).at n=35A239612
• Numbers n with the property that it is possible to write the base 2 expansion of n as concat(a_2,b_2), with a_2>0 and b_2>0 such that, converting a_2 and b_2 to base 10 as a and b, we have sigma(a)*sigma(b) = n.at n=22A244079