22869

Appears in sequences

• Larger members of g-reduced amicable pairs a < b such that sigma(a) = sigma(b) = a + b + gcd(a,b).at n=41A054572
• a(n) = 21*n^2.at n=33A064762
• a(n) = ((6*n+37)*4^n - 1)/3.at n=5A072259
• Number of increasing rooted trees on n nodes with thinning limbs.at n=8A124348
• Numbers of the form 68+p^2 (where p is a prime).at n=35A138691
• Greatest number m such that the fractional part of (4/3)^A154130(n) <= 1/m.at n=8A154134
• Greatest number m such that the fractional part of (4/3)^A154131(n) <= 1/m.at n=5A154135
• Numbers n such that (n^6 + 1091)/4 is prime.at n=13A181112
• Numerators of coefficients in the series expansion of ((2 - m) EllipticK(m) - 2 EllipticE(m))/(Pi * m).at n=6A189805
• Number of nX3 0..2 arrays with no occurrence of three equal elements in a row horizontally, vertically or nw-to-se diagonally, and new values 0..2 introduced in row major order.at n=3A204700
• Number of nX4 0..2 arrays with no occurrence of three equal elements in a row horizontally, vertically or nw-to-se diagonally, and new values 0..2 introduced in row major order.at n=2A204701
• T(n,k) = Number of n X k 0..2 arrays with no occurrence of three equal elements in a row horizontally, vertically or nw-to-se diagonally, and new values 0..2 introduced in row major order.at n=17A204705
• T(n,k) = Number of n X k 0..2 arrays with no occurrence of three equal elements in a row horizontally, vertically or nw-to-se diagonally, and new values 0..2 introduced in row major order.at n=18A204705
• Number of ordered triples (w,x,y) with all terms in {-n,...-1,1,...,n} and w+x+y>0.at n=18A211545
• Irregular triangle M_2(n,k) read by rows: number of maximum k-matchings in rooted plane trees of size n, 1<=k<=n/2, 2<=n.at n=31A219731
• Total number of ON cells in the "Ulam-Warburton" two-dimensional cellular automaton of A147562 after A048645(n) generations.at n=33A255264
• Number of length n arrays of permutations of 0..n-1 with each element moved by -7 to 7 places and the total absolute value of displacements not greater than 2*(n-1).at n=8A263904
• Number of maximal subsets of {1..n} containing n such that every subset has a different sum.at n=37A325867
• Number of compositions (ordered partitions) of n into distinct parts >= 6.at n=56A339104
• E.g.f. satisfies A(x)^A(x) = (1 - x * A(x))^(log(1 - x * A(x)) / 2).at n=7A357094