190125

Appears in sequences

• Numbers n that are the hypotenuse of exactly 17 distinct integer-sided right triangles, i.e., n^2 can be written as a sum of two squares in 17 ways.at n=17A097239
• Square of the (3,1)-entry of the 3 X 3 matrix M^n, where M = [1,0,0; 1,1,0; 1,i,1].at n=29A125641
• Triangle of second-order Eulerian numbers of type B.at n=30A214406
• Numbers that are multiple-digit narcissistic numbers in exactly six bases.at n=1A256365
• Triangle read by rows. The rows give the coefficients of the numerator polynomials for the o.g.f.s of the diagonal sequences of triangle A028338.at n=33A288875
• Numbers such that the list of exponents of their factorization is a palindromic list of primes.at n=28A322525
• Number of 2 X 2 matrices over Z_n whose permanent equals their determinant.at n=38A345754