1089936

Appears in sequences

• Numbers with prime factorization p^2*q^4*r^4 where p, q, and r are distinct primes.at n=13A190471
• Number of (n+2)X2 0..2 arrays with all rows having a nonnegative second derivative, and all columns having a positive second derivative in a quadratic least squares fit, with one and two element arrays taken as having a zero second derivative.at n=4A223389
• T(n,k) is the number of (n+2) X k 0..2 arrays with all rows having a nonnegative second derivative, and all columns having a positive second derivative in a quadratic least squares fit, with one and two element arrays taken as having a zero second derivative.at n=19A223391
• Perfect squares k such that each decimal digit of k is equal to the difference of at least two other digits of k.at n=18A255893
• Squares in A378769.at n=23A378984