22025

Appears in sequences

• Dying rabbits: a(n) = a(n-1) + a(n-2) - a(n-8).at n=23A023438
• Values of n where A072629 switches from 01010.. into 0000.. or back.at n=9A072630
• Primitive sliding numbers (excludes multiples of 10): totals, including repetitions, of sums r + s, r >= s, such that 1/r + 1/s = (r + s)/10^k for some k >= 0.at n=35A103184
• Antidiagonal sums of square table A112564 of generalized Flavius Josephus sieves.at n=13A112569
• Numbers k such that (2*k)!/(2*(k!)^2) - 1 is prime.at n=28A112861
• 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, -1), (0, -1, 1), (0, 1, 0), (1, 1, 0)}.at n=8A150325
• Length of shortest prefix of the Möbius sequence (A008683) containing all possible length-n blocks that appear.at n=5A280468
• a(n) = 2*a(n-1) - a(n-2) + 2*a(n-3) - 4*a(n-4) + 4*a(n-5) - 4*a(n-6) + 4*a(n-7) - 4*a(n-8) + 4*a(n-9) - 3*a(n-10) + 2*a(n-11) - 3*a(n-12) + 2*a(n-13) for n >= 16, with initial values as shown.at n=24A288511
• Expansion of 1/Sum_{k>=0} x^(k^2).at n=49A317665
• Number of pairs of integer partitions (y, v) of n such that there exists a pair of set partitions of {1,...,n} with meet {{1},...,{n}}, the first having block sizes y and the second v.at n=16A318396