39249

Appears in sequences

• a(n) = (2*n+1)*(10*n+1).at n=44A033574
• a(n) = (2*n+1)*(4*n^2+4*n+3)/3.at n=24A057813
• Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=2, r=2, I={0,1}.at n=36A080013
• A sequence generated from the Narayana triangle considered as a matrix, or from Pascal's triangle.at n=8A095266
• Reduced denominators of the fraction of primes < 10^n that are full reptend primes.at n=5A103363
• Triangular matrix T, read by rows, that satisfies: SHIFT_LEFT(column 0 of T^p) = p*(column p+3 of T), or [T^p](m,0) = p*T(p+m,p+3) for all m>=1 and p>=-3.at n=29A111544
• Column 1 of triangle A111544.at n=6A111545
• Numbers k such that the concatenation of k with 4*k gives a square.at n=4A115535
• Numbers n such that (n^6 + 1091)/4 is prime.at n=18A181112
• Number of (1+1) X (n+1) arrays of permutations of 0..n*2+1 with each element having directed index change -1,1 0,-1 0,1 or 1,0.at n=16A264507
• Number of (2n) X (2+1) arrays of permutations of 0..n*6-1 with each element having directed index change -1,0 0,2 -1,-2 or 1,0.at n=8A264514
• a(n) = A273059(4n+3).at n=34A275919
• Numbers k in A228058 such that also A001065(k) is in A228058.at n=47A325380