28728

Appears in sequences

• Denominator of B_{2n}/(-4n), where B_m are the Bernoulli numbers.at n=9A006863
• a(n) = floor(n*(n-1)*(n-2)*(n-3)/5).at n=21A011915
• Denominator of B(4n+2)/(8n+4) where B(m) are the Bernoulli numbers.at n=3A043304
• Engel expansion of sinh(1/3).at n=28A068380
• Numbers k not in A065036 but such that tau(k) = omega(k)^3.at n=26A074853
• Denominators of expansion of 1/x+1/log(1-x).at n=17A075178
• Largest number m such that a^n == 1 (mod m) whenever a is coprime to m.at n=17A079612
• Row sums in A083167.at n=27A083170
• Numbers whose set of base 8 digits is {0,7}.at n=18A097254
• a(n) = (n+1)*(n+2)^2*(n+3)*(11*n^3 + 58*n^2 + 101*n + 60)/720.at n=6A108646
• Integers i such that 41*i = 105 X i.at n=23A115876
• Largest number k such that the reduced totient function psi(k) = A002174(n).at n=8A143407
• Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0) and consisting of n steps taken from {(-1, -1), (0, 1), (1, 0)}.at n=11A151278
• Triangle of characteristic polynomials, see Mathematica code.at n=48A158389
• Numbers with exactly 64 divisors.at n=30A172443
• Row sums of triangle A182702.at n=17A182706
• Number of nondecreasing arrangements of 6 numbers x(i) in -(n+4)..(n+4) with the sum of sign(x(i))*x(i)^2 zero.at n=22A188006
• Central terms of Zorach additive triangle (cf. A035312).at n=10A189713
• Numbers with prime factorization p*q*r^3*s^3 (where p, q, r, s are distinct primes).at n=10A190108
• Number of (n+2)X(5+2) 0..2 arrays with every consecutive three elements in every row, column, diagonal and antidiagonal having exactly two distinct values, and new values 0 upwards introduced in row major order.at n=5A252858