102144

Appears in sequences

• (-1)^(n+1) * Determinant of n X n matrix of form [1^2 2^2 3^2 4^2 5^2 / 2^2 1^2 2^2 3^2 4^2 / 3^2 2^2 1^2 2^2 3^2 / 4^2 3^2 2^2 1^2 2^2 / 5^2 4^2 3^2 2^2 1^2].at n=5A071535
• Triangle read by rows: coefficients from the expansion of p(x,t) = tan(x*arctan(t)) which is in the Chebyshevlike form: T(t,x) = cos(x*arccos(t)).at n=25A137668
• The second left hand column of triangle A167580.at n=8A167581
• Sum of all the parts in the partitions of 6n into 6 parts.at n=7A256239
• Consider numbers n = concat(w,x,y,z) such that w*x*y*z | n. Leading zeros in x, y and z allowed. Sequence lists numbers that admit at least two such concatenations.at n=10A257172
• The diagonal of the rational function 1/(1 - x - y - x y - x z - y z).at n=5A268542
• a(n) = 288*n^2 - 96*n (n>=1).at n=18A305073
• Sum of all the parts in the partitions of n into 6 parts.at n=42A308867
• Numbers k such that sigma(sigma(k^4)) == 0 (mod k^2).at n=32A320425