40455

Appears in sequences

• a(n) = n*(n+1)*(n+2)*(n+7)/24.at n=29A005582
• Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 19 (most significant digit on right).at n=32A029512
• Numbers k such that 299*2^k + 1 is prime.at n=30A053366
• Numbers n for which there are exactly six k such that n = k + (product of nonzero digits of k).at n=26A096927
• Partial sums of floor(Fibonacci(n)/3).at n=24A179001
• Numbers n such that the sum of the distinct prime divisors of n that are congruent to 1 mod 4 equals the sum of the distinct prime divisors congruent to 3 mod 4.at n=23A215949
• Number T(n,k) of rooted identity trees with n nodes and colored non-root nodes using exactly k colors; triangle T(n,k), n>=1, 0<=k<=n-1, read by rows.at n=26A256068
• Expansion of 1/(1-x-x^2-x^3-x^4+x^5+x^6+x^7-x^9).at n=18A258000
• Row sums of irregular triangle A070168.at n=46A285098
• Triangle read by rows: T(n,k) is the number of chains of length k in the partially ordered (by subspace inclusion) set of all subspaces of GF(2)^n, n>=0, 0<=k<=n.at n=18A293845
• Indices of primes in A049685.at n=23A355980
• G.f. A(x) satisfies A(x) = 1 / ((1 - x) * (1 - 2 * x * A(x^2))).at n=10A390659