38232

Appears in sequences

• Number of irreducible chord diagrams with 2n nodes.at n=7A000699
• Numbers k such that 2*10^k - 1 is prime.at n=25A002957
• Functions of n points with no symmetries.at n=13A032176
• Duplicate of A000699.at n=6A051863
• Number of 2 X n matrices over GF(3) under row and column permutations.at n=11A052267
• a(n) = 2*a(n-1) - a(n-2) - a(n-4).at n=29A131041
• G.f. satisfies: A(x) = G(x/A(x)) where o.g.f. G(x) = A(x*G(x)) = Sum_{n>=0} A000085(n)*x^n.at n=14A172395
• Numbers k such that the sum of the divisors of k and the sum of the distinct prime divisors of k are both a square.at n=32A194196
• Numbers n such that the sum of the prime distinct divisors of n^2+1 equals 2 times the difference between the largest and the smallest prime divisor.at n=6A200071
• Number of -n..n arrays x(0..3) of 4 elements with zero sum and nonzero second and third differences.at n=18A200205
• Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 0 and 1 1 1 vertically.at n=6A209219
• Number of n X 7 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 0 and 1 1 1 vertically.at n=6A209223
• Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 0 and 1 1 1 vertically.at n=6A209228
• Number of (n+2) X (1+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00010101 or 01010101.at n=17A259735
• Triangle T(n,k) read by rows: coefficients of polynomials P_n(t) defined in Formula section.at n=16A286795
• Triangle T(n,k) read by rows: coefficients of polynomials P_n(t) defined in Formula section.at n=21A286796
• Triangle T(n,k) read by rows: coefficients of polynomials P_n(t) defined in Formula section. .at n=13A286798
• Triangle read by rows: The number of chord diagrams with n chords and k topologically connected components, 0 <= k <= n.at n=29A322402
• Expansion of 1/(1 - 9*x/(1 - 9*x)^(1/3))^(1/3).at n=5A377238