-3070

Appears in sequences

• Negative integers n such that in balanced ternary representation the number of occurrences of each trit doubles when n is squared.at n=8A257868
• Sequence composed of consecutive square matrices A(d) with dimension d=1,2,3,... Matrix elements are arranged by increasing row index i, and, within fixed i, by increasing column index j. Each block A(d) is related to the inverse of a class of integer Vandermonde matrices.at n=70A347781