97200

Appears in sequences

• Theta series of lattice A_2 tensor E_8 (dimension 16, det. 6561, min. norm 4). Also theta series of Eisenstein version of E_8 lattice.at n=4A004033
• Numbers k such that the square of d(k) (number of divisors) divides k.at n=31A046754
• The third of the three sequences associated with the polynomial x^3 - 2.at n=16A052103
• Jordan function J_4(n).at n=17A059377
• For n>3: a(n) is a multiple of three distinct earlier terms.at n=24A060301
• Sum of non-unitary divisors of n!.at n=7A064138
• Replace all prime factors p of n with n-p.at n=49A072194
• a(n) = product of first n digits in the decimal expansion of Pi, ignoring decimal point.at n=10A073055
• Partial products of successive digits in the decimal expansion of Pi.at n=9A074850
• Solve 2^n - 2 = 7(x^2 - x) + (y^2 - y) for (x,y) with x>0, y>0; sequence gives value of x.at n=36A076632
• Triangle T(n,k) read by rows, where T(n,k) = number of times the permanent of a real nonsingular n X n (0,1)-matrix takes the value k, for n >= 1, 1 <= k <= A000255(n).at n=27A089480
• Numbers containing squares of Pythagorean triples in their divisor set.at n=26A096472
• a(n+3) = 2a(n+2) - 3a(n+1) + 2a(n); a(0) = 1, a(1) = 1, a(2) = 0.at n=36A105578
• Number of different ways to select n elements from five sets of n elements under the precondition of choosing at least one element from each set.at n=5A115791
• a(n) is the product of the positive integers each of which is <= n and is divisible by exactly one prime dividing n (but is coprime to every other prime dividing n). (a(1) = 1).at n=14A119794
• Triangle of coefficients of (x+1)*(x+3)*(x+6)*...*(x+n(n+1)/2).at n=26A128813
• Product of the digital sums of n for all the bases 2 to n (a 'digital-sum factorial').at n=10A131384
• Union of A052103, A052102 and A052101, uniqued and sorted.at n=39A140495
• A triangle of coefficients of polynomials with roots as the Pi-digits base ten A000796(n)=d(n):d(1)=3; p(x,n)=-d(1)*Product[x-d(m),{m,2,n}].at n=45A152575
• a(n) = product of decimal digits of A000043(n).at n=41A163821