419904
domain: N
Appears in sequences
- Squares whose digits are squares.at n=24A019544
- Numbers of the form 4^i * 9^j, with i, j >= 0.at n=35A025620
- Numbers of form 6^i*9^j, with i, j >= 0.at n=28A025628
- Numbers of form 8^i*9^j, with i, j >= 0.at n=25A025633
- a(n) = 6*a(n-2), starting with 1, 3, 9.at n=14A026565
- Numbers k that divide the (right) concatenation of all numbers <= k written in base 9 (most significant digit on left).at n=39A029454
- Triangle whose (i,j)-th entry is binomial(i,j)*6^(i-j)*9^j.at n=22A038263
- Triangle whose (i,j)-th entry is binomial(i,j)*9^(i-j)*6^j.at n=26A038296
- Squares expressible as the sum of two positive cubes in at least one way.at n=16A050802
- a(n) = 64*9^(n-2), a(0)=1, a(1)=7.at n=6A055995
- Squares k which are divisible by phi(k).at n=30A063755
- 6-full numbers: if p divides n then so does p^6.at n=30A069493
- 1/2 number of n X n 0..8 matrices with MM' mod 9 = I.at n=3A071307
- Product of divisors of n which are >= n^(1/2).at n=35A072500
- Product of consecutive previous terms (starting with 2,3).at n=14A080338
- Triangle read by rows: T(n,k) = 2^k * 3^n, 0 <= k <= n.at n=42A100852
- a(n)=Product{k=0..n, 1+2^A010060(k)}/2.at n=14A101652
- Squares for which both the sum of the digits and the product of the digits are cubes.at n=22A117687
- 3-smooth numbers 2^i*3^j where i and j are regular 3-smooth numbers.at n=48A120942
- a(n) = n^2*3^n.at n=8A127960