-449

Appears in sequences

• arcsinh(arcsin(arcsinh(x)))=x-1/3!*x^3+17/5!*x^5-449/7!*x^7+30113/9!*x^9...at n=3A012117
• a(n)=1+(1/12)(n*(n+1)*(n+3)*(4-n)).at n=9A080260
• Abundance values of numbers whose abundance is (+-1) times a prime.at n=32A088006
• Column 0 of the matrix inverse of triangle A117401(n,k) = (2^k)^(n-k).at n=6A118196
• Fibonacci central tridiagonal matrices as a triangular sequence from a recursive polynomial definition.at n=24A123974
• Triangle read by rows, T[n,2i-1]=2T[n-1,i],T[n,2i]=2k-1-2T[n-1,i].at n=30A138583
• Expansion of (1-2x-5x^2-7x^3+x^6)/((1-x)(1-x^3)^2).at n=25A141352
• Expansion of 1/(1-x*(1-10*x)).at n=6A146080
• Numerator of Hermite(n, 1/30).at n=2A160291
• Expansion of (1+x+x^2)*(1-8*x^3-14*x^4+8*x^7+x^8)/(1+x^4)^3.at n=30A188477
• Values of n such that L(13) and N(13) are both prime, where L(k) = (n^2+n+1)*2^(2*k) + (2*n+1)*2^k + 1, N(k) = (n^2+n+1)*2^k + n.at n=5A227516
• G.f.: x^((k^2+k)/2)/(mul(1-x^i,i=1..k)*mul(1+x^r,r=1..oo)) with k = 4.at n=57A246583
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 331", based on the 5-celled von Neumann neighborhood.at n=11A271280
• a(n) = a(n-2) - 2a(n-3) + a(n-4) for n>3, with a(0)=2, a(1)=0, a(2)=1, a(3)=-1, a sequence related to Pellian numbers.at n=15A292521
• Expansion of 1/Sum_{k>=0} x^(k^3).at n=45A323633
• a(1) = 1; a(n) = Sum_{k=2..n} (-1)^k * k * a(floor(n/k)).at n=52A359479
• a(1) = 1; a(n) = Sum_{k=2..n} (-1)^k * k * a(floor(n/k)).at n=53A359479
• a(n) = 1 + Sum_{k=2..n} (-1)^k * k^2 * a(floor(n/k)).at n=22A361983
• L.g.f.: log( Sum_{k>=0} x^(k^3) ).at n=41A363783
• a(n) = Sum_{k=1..n} (-1)^k*k^2*floor(n/k).at n=32A366915