73800

Appears in sequences

• a(0)=1; a(n) = sigma_1(n) + sigma_3(n).at n=40A092345
• Triangle read by rows: (1/4) * (A007318^3 - A007318^(-1)) as infinite lower triangular matrices.at n=47A131049
• Numbers with prime factorization p*q^2*r^2*s^3 (where p, q, r, s are distinct primes).at n=35A190109
• The greedy sequence of real numbers at least 1 that do not contain any 4-term geometric progressions with integer ratio.at n=18A235055
• Number of (n+2) X (1+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 1 3 4 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 1 3 4 6 or 7.at n=6A252543
• T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 3 4 6 or 7.at n=27A252544
• Number of nonisomorphic proper colorings of partition multicycle graph using six colors.at n=77A298266
• Expansion of e.g.f. (1/2)*(x^2*exp(x))*(sinh(x))^2.at n=10A373134