25225

Appears in sequences

• Witt vector *3!/3!.at n=4A006178
• a(n) is the concatenation of n and 9n.at n=24A009474
• Number of Lyndon words (aperiodic necklaces) with 3n beads of 3 colors, n beads of each color. One color labeled, the other two unlabeled.at n=4A029808
• Numbers k such that 95*2^k+1 is prime.at n=31A032397
• Numbers k such that 245*2^k+1 is prime.at n=25A032499
• Numbers using only the digits 2 and 5, that are both curved and straight.at n=39A072961
• Equal count of primes congruent to 1 mod 4 and 3 mod 4 associated with primes in A007351 (the zero beginning the sequence indicates the prime 2).at n=29A092198
• Numbers k such that k and k^2 use only the digits 0, 2, 3, 5 and 6.at n=51A136888
• "Early bird" squares: write the square numbers in a string 149162536496481100... . Sequence gives numbers k such that k^2 occurs in the string ahead of its natural place.at n=42A181585
• Number of ordered triples (w,x,y) with all terms in {1,...,n} and 2w^2>=x^2+y^2.at n=37A211803
• Rolling icosahedron footprints: number of n X 3 0..11 arrays starting with 0 where 0..11 label vertices of an icosahedron and every array movement to a horizontal, diagonal or antidiagonal neighbor moves along an icosahedral edge.at n=2A223228
• T(n,k)=Rolling icosahedron footprints: number of nXk 0..11 arrays starting with 0 where 0..11 label vertices of an icosahedron and every array movement to a horizontal, diagonal or antidiagonal neighbor moves along an icosahedral edge.at n=12A223233
• Rolling icosahedron footprints: number of 3 X n 0..11 arrays starting with 0 where 0..11 label vertices of an icosahedron and every array movement to a horizontal, diagonal or antidiagonal neighbor moves along an icosahedral edge.at n=2A223235
• a(n) = coefficient of x^n*y^n/n in log( Product_{n>=1} 1/(1 - (x^(2*n) - y^(2*n))/(x - y)) ), for n >= 1.at n=8A322191