271441

Appears in sequences

• Squares of Lucas numbers.at n=13A001254
• Associated Mersenne numbers.at n=26A001350
• A Fielder sequence: a(n) = a(n-1) + a(n-3) + a(n-4), n >= 4.at n=26A001638
• Alternate Lucas numbers - 2.at n=13A004146
• Number of restricted circular combinations.at n=24A006499
• Unrestricted Perrin pseudoprimes.at n=0A013998
• Squares of odd Lucas numbers.at n=8A014730
• Expansion of (1+x^2)/(1-2*x+x^3).at n=24A014739
• Shifts left two places under BIN1 transform.at n=26A052341
• Squares that are the concatenation of three numbers, one of which is the sum of the other two.at n=14A062555
• a(n) = Lucas(n+1) + (3*(-1)^n - 1)/2.at n=25A074392
• a(n) = Lucas(4*n+2)-2 = Lucas(2*n+1)^2.at n=6A081071
• a(n) is the largest integer whose cube has n digits and first digit 1, except that a(2)=2.at n=16A083378
• a(n) is the number of images of the border correlation function for binary words of length n (cf. link).at n=25A091838
• a(2n) = Lucas(2n+3)^2, a(2n+1) = Lucas(2n+1)^2.at n=10A105671
• a(2n) = Lucas(2n+3)^2, a(2n+1) = Lucas(2n+1)^2.at n=13A105671
• Squares of lesser of twin primes.at n=24A108570
• 288*n^2 - 168*n - 119.at n=30A118059
• a(n) = Product_{k=1..n} (1 + 4*sin(2*Pi*k/n)^2).at n=13A152152
• Number of slanted 2 X n (i=1..2) 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=29A165394