151979

Appears in sequences

• Semiprimes of the form n^4 - n^3 - n - 1.at n=5A241670
• Numbers k such that (238*10^k - 1)/3 is prime.at n=32A273542
• Sequence of pairwise relatively prime numbers of class P_7 (see comment in A275246).at n=38A275252
• Numbers k such that k and k+2 have the same unitary abundance (A129468).at n=18A335252
• Twice the area of the convex hull around dragon curve expansion level n.at n=16A341029