171990

Appears in sequences

• Triangle read by rows: (1/5) * (A007318^4 - A007318^(-1)) as infinite lower triangular matrices.at n=49A131050
• List of fixed points of the base-4 Kaprekar map A165012.at n=10A165016
• Consider the base-4 Kaprekar map n->K(n) defined in A165012. Sequence gives numbers belonging to cycles, including fixed points.at n=17A165017
• Consider the base-4 Kaprekar map n->K(n) defined in A165012. Sequence gives least elements of each cycle, including fixed points.at n=13A165021
• Smallest member of cycle corresponding to n-th term of A165029.at n=15A165030
• Numbers n > 0 such that n^6 + 1091 and n^6 + 1093 are both prime.at n=2A181114
• Triangle read by rows, 3^k*S_3(n, k) where S_m(n, k) are the Stirling-Frobenius subset numbers of order m; n >= 0, k >= 0.at n=24A225466
• 26-gonal pyramidal numbers: a(n) = n*(n+1)*(8*n-7)/2.at n=35A256646
• a(n) = Product_{d|n} A019565(d)^A010051(n/d).at n=69A329352
• a(n) = numerator(b(n)), where b(0) = b(1) = 1 and b(n) = n*b(n-1)/b(n-2) for n >= 1.at n=27A329654