64827

Appears in sequences

• Numbers of the form 3^i*7^j with i, j >= 0.at n=37A003594
• Numbers whose prime factors are 3 and 7.at n=21A033850
• Gaps of 2 in sequence A038593 (upper terms).at n=29A038644
• Number of functions f:[n]->[n] such that f[(2*x) mod n]=[2*f(x)] mod n for all x in [n], for n=1,2,3,... Here [n] denotes {0,1,2,...,n-1}.at n=20A117987
• 1/4 of the number of 4-colorings of an n X n array symmetric about both diagonal and antidiagonal.at n=5A145241
• Products of the 4th power of a prime and a distinct prime of power 3 (p^4*q^3).at n=11A179666
• Numbers of the form 20*k+7 which are three times a square.at n=29A192328
• Strong Achilles numbers: Achilles numbers m such that phi(m) is also an Achilles number, where phi(m) denotes Euler's totient function of m.at n=25A194085
• Numerator of A010786(n+1) / A010786(n).at n=40A208449
• Matrix inverse of A181543 (cubes of entries of Pascal's triangle).at n=33A216207
• Rolling cube footprints: number of n X 6 0..7 arrays starting with 0 where 0..7 label vertices of a cube and every array movement to a horizontal or antidiagonal neighbor moves along a corresponding cube edge.at n=1A223329
• T(n,k)=Rolling cube footprints: number of nXk 0..7 arrays starting with 0 where 0..7 label vertices of a cube and every array movement to a horizontal or antidiagonal neighbor moves along a corresponding cube edge.at n=17A223331
• T(n,k)=Rolling cube footprints: number of nXk 0..7 arrays starting with 0 where 0..7 label vertices of a cube and every array movement to a horizontal or antidiagonal neighbor moves along a corresponding cube edge.at n=22A223331
• Rolling cube footprints: number of 3 X n 0..7 arrays starting with 0 where 0..7 label vertices of a cube and every array movement to a horizontal or antidiagonal neighbor moves along a corresponding cube edge.at n=3A223332
• Solutions of the equation n' = n + phi(n), where n' is the arithmetic derivative of n.at n=9A230545
• Numerators of (product of divisors of n / sum of divisors of n).at n=41A244668
• a(n) = 7*n^3.at n=21A244727
• Odd numbers of the form (m*k)^2/(m^2-k^2) for distinct integers m and k.at n=32A259288
• Prime factorization representation of Stern polynomials B(n,x) with only the odd powers of x present: a(n) = A248101(A260443(n)).at n=71A284554
• a(n) = A248101(A277324(n)).at n=35A284564