40221

Appears in sequences

• Indices of primes in sequence defined by A(0) = 11, A(n) = 10*A(n-1) + 51 for n > 0.at n=11A056247
• Sum of antidiagonals of A060736.at n=41A061349
• a(n) = (2*n - 1)*(7*n^2 - 7*n + 3)/3.at n=20A063494
• Absolute differences between A109441 and A100948.at n=21A120722
• Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,0,2,1,4 for x=0,1,2,3,4.at n=4A196478
• Number of n X 5 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,0,2,1,4 for x=0,1,2,3,4.at n=4A196482
• T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,0,2,1,4 for x=0,1,2,3,4.at n=40A196485
• G.f. satisfies: A(x) = 1/(1 - x/A(-x*A(x)^7)^2).at n=7A213229
• Number of primitive permutations with n buds and 4 red or blue elements.at n=4A226297
• Number of ternary strings of length n with maximal run length four containing 11112.at n=8A269916
• Numbers k such that k + A224787(k) is a square.at n=19A386640