6200145

Appears in sequences

• Triangle whose (i,j)-th entry is binomial(i,j)*3^(i-j)*9^j.at n=32A038227
• Triangle whose (i,j)-th entry is binomial(i,j)*9^(i-j)*3^j.at n=31A038293
• Number of divisors of the n-th positive number that is both triangular and square.at n=35A242585
• Number of (n+2) X (1+2) 0..3 arrays with every consecutive three elements in every row and column not having exactly two distinct values, and in every diagonal and antidiagonal having exactly two distinct values, and new values 0 upwards introduced in row major order.at n=34A253018
• A variant of Look and Say sequence (A005150) based on exponents in prime factorization of n (see Comments section for precise definition).at n=36A356008
• Expansion of e.g.f. (1/x) * Series_Reversion( x/(3*x + sqrt(9*x^2+1))^(1/3) ).at n=8A385443