65610
domain: N
Appears in sequences
- Expansion of g.f.: (1+x)/(1-9*x).at n=5A003952
- a(n) = 10*3^n.at n=8A005052
- a(n) = floor(n/5)*floor((n+1)/5)*floor((n+2)/5)*floor((n+3)/5)*floor((n+4)/5).at n=46A008382
- Numbers of form 3^i*10^j, with i, j >= 0.at n=31A025616
- Numbers of form 9^i*10^j, with i, j >= 0.at n=16A025635
- Denominator of Bernoulli(2n,1/3).at n=4A033471
- Triangle whose (i,j)-th entry is binomial(i,j)*2^(i-j)*9^j.at n=19A038215
- Triangle whose (i,j)-th entry is binomial(i,j)*3^(i-j)*9^j.at n=18A038227
- Triangle whose (i,j)-th entry is binomial(i,j)*9^(i-j)*2^j.at n=16A038292
- Triangle whose (i,j)-th entry is binomial(i,j)*9^(i-j)*3^j.at n=17A038293
- Sums of two distinct powers of 9.at n=14A038487
- Numbers k such that Sum_{j} p_j = Sum_{j} e_j where Product_{j} p_j^(e_j) is the prime factorization of k.at n=41A054411
- Sums of two powers of 9.at n=19A055260
- Diagonal of table A062104.at n=11A062107
- Numbers which can be written as b^2*c^2*(b^2+c^2).at n=38A063663
- Stirling2 triangle with scaled diagonals (powers of 9).at n=17A075504
- Third column of triangle A075504.at n=3A076009
- Let f(n) = fraction of digits that are nonzero when n is written in base 2 and g(n) the same fraction for base 3. Let h(n) = max {f(n), g(n)}. Sequence gives n for which h(n) sets a new low record.at n=9A078415
- a(n) = (n+1)*n^4.at n=9A101362
- Smallest number ending with the digits of n that has exactly n prime factors (counted with multiplicity).at n=9A109687