26364

Appears in sequences

• a(n) = (2*n - 13)*n^2.at n=26A015246
• Smallest multiple of n^2 beginning with n.at n=25A078210
• Starting positions of strings of three 5's in the decimal expansion of Pi.at n=28A083620
• a(n) = n^4 - n^3.at n=13A085537
• a(n) = n*(n + 1)^3.at n=12A085540
• Numbers whose set of base 13 digits is {0,C}, where C base 13 = 12 base 10.at n=8A097259
• Numbers of the form (12^i)*(13^j), with i, j >= 0.at n=13A108771
• Numbers m such that m^k does not divide the denominator of the m-th generalized harmonic number H(m,k) nor the denominator of the m-th alternating generalized harmonic number H'(m,k), for k = 4.at n=44A128674
• a(n) = p^3*(p-1), where p = prime(n).at n=5A138403
• Integers n such that by inserting between their digits + or - or * or / or ^ or nothing (i.e., concatenate two digits) you recover n back in a nontrivial way.at n=19A157198
• Floor(1/{(9+n^4)^(1/4)}), where {} = fractional part.at n=38A184633
• a(n) = phi(n^4).at n=12A189393
• n^3 + floor(n^3/2).at n=25A211786
• Number of (w,x,y,z) with all terms in {0,...,n}, w, x and y odd, and z odd.at n=24A212764
• a(n) = n-th second-order hyperharmonic-exponential number, multiplied by n!.at n=5A222145
• Exponents m such that the decimal expansion of 9^m exhibits its first zero from the right later than any previous exponent.at n=18A239014
• Numbers k such that the k-th cyclotomic polynomial has a root mod 13.at n=23A245481
• Square array A(n, k) read by antidiagonals downwards: multiplicative order of 2 modulo prime(n)^k, where k runs over the positive integers.at n=32A282902
• Numbers k such that k mod phi(k) = lambda(k).at n=29A290184
• Sum of even integers <= n times the sum of odd integers <= n.at n=25A330520