20069

Appears in sequences

• Seventh diagonal (m=6) of triangle A084938; a(n) = A084938(n+6,n) = (n^6 + 45*n^5 + 925*n^4 + 11475*n^3 + 92314*n^2 + 413640*n)/720.at n=7A090392
• a(n) = 1 + 2 * least i such that A103509(i)=n+1, 0 if no such i exists.at n=45A103510
• Absolute differences between A109441 and A100948.at n=20A120722
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 411", based on the 5-celled von Neumann neighborhood.at n=30A271891
• Numbers k such that (14*10^k + 211)/9 is prime.at n=16A294941
• Numbers m such that Stern polynomial B(m,x) has no irreducible polynomial factors that themselves are Stern polynomials. The initial a(1) = 1 is included by convention.at n=27A389918