248640

Appears in sequences

• Expansion of 1/((1-2x)(1-4x)(1-6x)(1-8x)).at n=5A025966
• Numbers k such that k-1, k+1, 2*k-1, 2*k+1, 4*k-1 and 4*k+1 are all prime.at n=1A069175
• Stirling2 triangle with scaled diagonals (powers of 2).at n=39A075497
• Gives the i-th coefficient M(k,i) of the decomposition of the polynomials B(k,X^2) in the basis of all B(i,X), where B(i,X) is the i-th binomial polynomial: B(i,X) = X(X-1)...(X-i+1)/i! for any i > 0 and B(0,X) = 1 by definition.at n=33A100344
• a(n) = 8*(n-1)*(n-2)*(n-3)*(6*n^2-37*n+60).at n=7A134241
• Numbers k such that k^3 - 1 and k^3 + 1 are both semiprimes.at n=21A268043
• T(n,k) is the n-th derivative of the difference between the k-th tetration of x (power tower of order k) and its predecessor (or 0 if k=0) at x=1; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=42A277536
• Triangle read by rows: T(n,k) = number of vertex labeled connected Goldstone diagrams with n interactions and k external potentials.at n=17A328921
• Expansion of e.g.f. 1/(1 - x * exp(x^2/2)).at n=8A358264