43406

Appears in sequences

• Numbers k such that 87*2^k+1 is prime.at n=33A032393
• Starting index of a string of exactly 4 consecutive equal digits in decimal expansion of Pi.at n=29A049520
• a(n) = floor(a(n-1)/2) + a(n-2) with a(0)=1, a(1)=2.at n=43A064650
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 0), (0, 1, -1), (1, 0, 1), (1, 1, -1)}.at n=9A149426
• a(0) = a(1) = 1; a(n) = [x^n] Product_{k=1..n-1} 1/(1 - x^a(k))^a(k).at n=32A293807
• Number of 2n-step paths from (0,0) to (0,n) that stay in the first quadrant (but may touch the axes) consisting of steps (1,0), (0,1), (0,-1) and (-1,1).at n=6A317782