80784
domain: N
Appears in sequences
- a(0) = 0, a(1) = 1; for n >= 2, a(n) = 9*a(n-1) + 7*a(n-2).at n=6A015583
- Expansion of 1/((1-x)^4*(1-x^2)^2).at n=29A028346
- Row sums of Pellonomial triangle A099927.at n=7A099928
- Numbers with prime factorization pqr^3s^4.at n=27A190294
- Number of n X 4 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 0 1 and 1 0 1 vertically.at n=15A207064
- G.f.: Sum_{n>=1} Pell(n+1) * x^n / (1 - x^n), where Pell(n) = A000129(n).at n=12A256272
- G.f.: x^2 * f''(x), where f(x) = Product_{k>=1} 1 / (1 - x^k).at n=17A278406
- Triangle T(n,k) read by rows: coefficients of polynomials P_n(t) defined in Formula section.at n=18A286782
- Column 2 of A286782.at n=3A287032