40068

Appears in sequences

• Number of nonempty labeled simple graphs on nodes chosen from an n-set.at n=6A004140
• Convolution of odd numbers and primes.at n=32A023662
• Amicable triples: numbers such that sigma(x) = sigma(y) = sigma(z) = x+y+z, x<y<z. We order these triples according to the common value of sigma. Sequence gives y numbers.at n=5A125491
• Triangle T(n, k) = Eulerian(n+1, k)*Binomial(n+1, k)/(k+1), read by rows.at n=30A155467
• Triangle T(n, k) = Eulerian(n+1, k)*Binomial(n+1, k)/(k+1), read by rows.at n=33A155467
• Number of binary strings of length n with no substrings equal to 0011 0101 or 1100.at n=19A164505
• Principal diagonal of the convolution array A213819.at n=26A213820
• Number of binary arrays indicating the locations of trailing edge maxima of a random length-n 0..1 array extended with zeros and convolved with -1,2,-1.at n=20A222036
• Riordan array (1/(1-3*x), (1-3*x-sqrt(1-6*x+5*x^2))/(2*x)).at n=49A236420
• Number of 3 X 3 symmetric matrices with row and column sums <= n.at n=9A244865
• Numbers that belong to at least one amicable tuple.at n=32A255215
• Number of exact 3-colored partitions such that no adjacent parts have the same color.at n=13A262445
• Numbers k such that sigma(k) = sigma(k - d(k)).at n=39A277273
• Triangle T(n,r) read by rows: order of the semigroup of orientation-preserving partial transformations of n elements with breath r.at n=48A289710
• Number of length-n binary strings w with the property that if x is a subword of w and |x| >= 6, then x reversed is not a subword of w.at n=29A330012