20224

Appears in sequences

• Expansion of log(1+sinh(sin(x))).at n=9A009346
• arctan(sin(sinh(x))) = x - 2/3!*x^3 +16/5!*x^5 - 440/7!*x^7 + 20224/9!*x^9 - ....at n=4A012030
• a(n) = T(2n,n), T given by A027157.at n=6A027158
• a(n) = T(n,[ n/2 ]), T given by A027157.at n=12A027163
• Sin(n) decreases monotonically to -1.at n=33A046964
• Number of ordered factorizations with 2 levels of parentheses indexed by prime signatures.at n=23A050357
• Number of degree-n even permutations of order dividing 4.at n=9A061129
• Number of degree-n even permutations of order dividing 8.at n=9A061131
• Integer part of the blowup factor for A025587(n).at n=12A061523
• a(0)=1; a(n) is the smallest integer > a(n-1) such that sin(a(n)) is closer to an integer (here 0 or -1) than sin(a(n-1)).at n=32A079037
• Third binomial transform of C(n+2,2).at n=6A081893
• Number of configurations of the sliding block 8-puzzle that require a minimum of n moves to be reached, starting with the empty square in one of the corners.at n=23A089473
• Concerning the popular MMORPG "Runescape" by JAGeX corporation, this sequence gives the number of experience points needed for a given level in a skill.at n=33A111078
• Number of degree-2n permutations such that number of cycles of size 2k-1 is even (or zero) for every k.at n=4A130276
• a(n) = 10^n mod 6^n.at n=6A139736
• a(n) = 2025*n^2 - 3401*n + 1428.at n=3A156854
• Totally multiplicative sequence with a(p) = 7p+2 for prime p.at n=43A166675
• a(n) = 4^(floor(n/2))+4^(floor(n/2)-1)-4^(floor((n-1)/3)).at n=13A170833
• a(n) = 4^(floor(n/2))+4^(floor(n/2)-1)-4^(floor((n-1)/3)).at n=12A170833
• G.f.: -x*(x-1)*(1+x)/(1-x-7*x^2-x^3+x^4).at n=10A171064