-45

Appears in sequences

• Nearest integer to tan n.at n=55A000209
• Expansion of Product_{n>=1} (1-x^n)^5.at n=28A000728
• Expansion of Product_{n>=1} (1-x^n)^5.at n=11A000728
• a(n) = a(n-1)*a(n-2) - 1.at n=8A001054
• The negative integers.at n=44A001478
• Expansion of (Product_{j>=1} (1-(-x)^j) - 1)^5 in powers of x.at n=41A001483
• a(n) = -n.at n=45A001489
• a(n) = -a(n-1) - 2*a(n-2).at n=12A001607
• a(n) = (3^n/n!)*Product_{k=0..n-1} (3*k - 1).at n=3A004990
• Bond percolation series for hexagonal net.at n=4A006735
• From fundamental unit of Z[ (-n)^1/4 ].at n=9A006830
• G.f.: Product_{k>0} (1-x^(5k-1))*(1-x^(5k-4))/((1-x^(5k-2))*(1-x^(5k-3))).at n=46A007325
• Triangle read by rows of Stirling numbers of first kind, s(n,k), n >= 1, 1 <= k <= n.at n=53A008275
• Triangle of Stirling numbers of first kind, s(n, n-k+1), n >= 1, 1 <= k <= n. Also triangle T(n,k) giving coefficients in expansion of n!*binomial(x,n)/x in powers of x.at n=46A008276
• Expansion of log(1+sinh(log(1+x))).at n=4A009345
• E.g.f. log(1+x)*cos(x).at n=6A009410
• Expansion of e.g.f. log(1+x)/cosh(sinh(x)).at n=6A009432
• E.g.f.: expansion of tanh(log(1+x))/exp(x).at n=5A009782
• Expansion of tanh(log(1+x)*exp(x)).at n=5A009785
• Expansion of tanh(log(1+x)/cos(x)).at n=5A009786