53217

Appears in sequences

• a(1)=1, a(2)=2. a(n) is the a(n-1)th integer from among those positive integers coprime to a(n-2).at n=28A126881
• a(n) = 3*a(n-1) - 3*a(n-2) + 3*a(n-3), with a(0)=1, a(1)=3, a(2)=1.at n=18A136297
• Triangle read by rows: T(n,k), 0 <= k <= n, gives the coefficients of the Charlier polynomials (with parameter a=1), ordered by rising powers.at n=45A137338
• 1/10 of the number of 10-colorings of an n X n array symmetric about main diagonal.at n=2A145261
• 1/10 of the number of 10-colorings of an n X n array symmetric about both diagonal and antidiagonal.at n=3A145262
• a(n) = 73*n^2.at n=27A174334
• q-expansion of modular form psi_0^4/t_{3B}.at n=36A198956
• (n-1)-st elementary symmetric function of the first n terms of the periodic sequence (1,1,1,3,1,1,1,3,...).at n=28A203235
• Numbers of the form 6^j + 9^k, for j and k >= 0.at n=33A226830
• G.f. A(x) satisfies: A(x) = A(x^2) + x * (1 + 4*x + x^2) / (1 - x)^4.at n=35A328408
• Square array T(n,k), n>=0, k>=0, read by antidiagonals downwards, where column k is the expansion of 1/(1 - 9*x*(1 - x)^k)^(1/3).at n=52A361840
• Expansion of 1/(1 - 9*x*(1-x)^2)^(1/3).at n=7A361844
• a(n) = n^3 * (n^2 - n + 1).at n=9A382612