-1472

Appears in sequences

• Ramanujan's tau function (or Ramanujan numbers, or tau numbers).at n=3A000594
• q-expansion of modular form of weight 13/2: eta(8 tau)^12 * theta(tau).at n=64A002284
• Expansion of 1 / Sum_{n=-oo..oo} x^(n^2).at n=15A004402
• Expansion of sin(tan(x)/cos(x)).at n=3A009516
• Ramanujan's tau function (or tau numbers (A000594)) for 2^n.at n=2A035174
• A sequence related to Ramanujan's tau function.at n=12A055978
• Expansion of 1/(1+2*x^2-2*x^3).at n=16A077964
• Expansion of 1/(1+2*x^2+2*x^3).at n=16A077968
• The even bisection of A000594.at n=1A099060
• Inverse of Riordan array (1/(1-x), x/(1-x)^3), A109955.at n=41A109956
• Determinants of 4 X 4 matrices of 16 consecutive primes.at n=2A118799
• Expansion of x^3 / ( 1+2*x^2+2*x^3 ).at n=18A123958
• a(n) = 13 + 12*n - n^2.at n=45A136316
• Irregular triangle read by rows: let c = -(x - x^2), b = (-1 - a + 2 x)/x, and a = 0, expansion of p(x, n) = (a + b*x)*p(x, n - 1) + c*p(x, n - 2).at n=59A139144
• a(n) = -(n - 4)*(n - 5)*(n - 12)/6.at n=22A167541
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 155", based on the 5-celled von Neumann neighborhood.at n=23A270328
• Ramanujan function tau(p) as p runs through the prime powers: a(n) = A000594(A000961(n)).at n=3A278577
• Triangle read by rows: T(n,k) = T(n-k,k-1) with T(0,0) = 1 and T(n,0) = -1/n * Sum_{k=1..A003056(n)} (-1)^k * (2*k+1) * (n+1-A060544(k+1)) * T(n,k).at n=5A292781
• Triangle read by rows: T(n,k) = T(n-k,k-1) with T(0,0) = 1 and T(n,0) = -1/n * Sum_{k=1..A003056(n)} (-1)^k * (2*k+1) * (n+1-A060544(k+1)) * T(n,k).at n=9A292781
• Triangle read by rows: T(n,k) = T(n-k,k-1) with T(0,0) = 1 and T(n,0) = -1/n * Sum_{k=1..A003056(n)} (-1)^k * (2*k+1) * (n+1-A060544(k+1)) * T(n,k).at n=16A292781