37784

Appears in sequences

• Sum of n plus its prime factors associated with A020700.at n=35A020905
• Numbers k such that 121*2^k+1 is prime.at n=13A032410
• Number of slanted nX6 (i=1..n)X(j=i..6+i-1) 1..4 arrays with all 1s connected, all 2s connected, all 3s connected, all 4s connected, 1 in the upper left corner, 2 in the upper right corner, 3 in the lower left corner, 4 in the lower right corner, and with no element having more than 3 neighbors with the same value.at n=2A165383
• Number of slanted 4Xn (i=1..4)X(j=i..n+i-1) 1..4 arrays with all 1s connected, all 2s connected, all 3s connected, all 4s connected, 1 in the upper left corner, 2 in the upper right corner, 3 in the lower left corner, 4 in the lower right corner, and with no element having more than 3 neighbors with the same value.at n=4A165396
• Number of -n..n arrays x(0..3) of 4 elements with sum zero and with zeroth through 3rd differences all nonzero.at n=19A200040
• Numbers k such that 2*R_k + 9*10^k + 7 is prime, where R_k = 11...11 is the repunit (A002275) of length k.at n=5A259140
• Coordination sequence for (2,5,6) tiling of hyperbolic plane.at n=25A265065
• Starts of a run of at least n consecutive numbers k for which k^2 - k + 41 is composite.at n=21A284043
• Starts of a run of at least n consecutive numbers k for which k^2 - k + 41 is composite.at n=22A284043