160650

Appears in sequences

• Number of n X 4 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 1 1 0 vertically.at n=16A208283
• Number of (w,x,y,z) with all terms in {1,...,n} and w>2x and y<=3z.at n=30A212517
• a(1) = 1; for n>1, a(n) = smallest integer > a(n-1) such that a(n)*a(n-i)+1 is prime for all 0 <= i <= n-1.at n=6A219761
• Numbers n such that n = concatenate(a, b) and sigma(a) + sigma(b) = phi(n).at n=14A249065
• Expansion of e.g.f. exp(x^4/(24 * (1-x))).at n=10A361545