26541

Appears in sequences

• Positive numbers k such that k and 2*k are anagrams in base 7 (written in base 7).at n=9A023068
• Triangle, read by rows, where the n-th row lists the coefficients of the polynomial of degree n that generates the n-th diagonal of this sequence.at n=56A091150
• Row sums of triangle A091150, in which the n-th row lists the coefficients of the polynomial of degree n that generates the n-th diagonal.at n=9A091151
• Triangular matrix, read by rows, equal to the matrix square of A102225, such that the first differences of row k forms row (k+1) of A102225.at n=30A102228
• Table in which the g.f. of row n, R(n,x), satisfies Sum_{k=-oo..+oo} (-1)^k * (x^k + n*R(n,x))^k = 1 + (n+2)*Sum_{k>=1} (-1)^k * x^(k^2), for n >= 1, as read by antidiagonals.at n=71A370020
• Expansion of g.f. A(x) satisfying Sum_{n=-oo..+oo} (-1)^n * (x^n + 7*A(x))^n = 1 + 9*Sum_{n>=1} (-1)^n * x^(n^2).at n=5A370027