5592404

Appears in sequences

• Barlow packings with group R3(bar)m(SO) that repeat after 6n+3 layers.at n=23A011954
• a(n) = a(n-1) + 2*a(n-2) + 2, for n>=3, where a(0)= 1, a(1)= 2, a(2)= 4.at n=22A026644
• Totient of 2^n+1.at n=23A053285
• Partial sums of Jacobsthal gap sequence.at n=22A080610
• a(n) = (4/3)*(4^n - 1).at n=11A080674
• Expansion of x*(1+2*x)/((1+x)*(1-x)*(1-2*x)).at n=22A084639
• Expansion of (1+x-4*x^2) / ((1+x)*(1-4*x^2)).at n=23A087213
• a(1) = 4; then alternately add -4 and multiply by -2.at n=45A096406
• Expansion of (1 - 2*x + 2*x^2)/((1 - x^2)*(1 - 2*x)).at n=23A097072
• Expansion of (1-x+2*x^2)/((1+x)*(1-2*x)).at n=23A097073
• Expansion of (1+3x)/((1-x)(1-4x^2)).at n=21A097164
• Expansion of -2*x*(-3-2*x+4*x^2) / ((x-1)*(2*x+1)*(2*x-1)*(1+x)).at n=22A120462
• First differences of A130624.at n=22A130625
• a(1)=1, a(n) = a(n-1) + (p-1)*p^(n/2-1) if n is even, else a(n) = a(n-1) + p^((n-1)/2), where p=4.at n=21A133628
• a(n)=a(n-1)+a(n-2)+a(n-3)+2a(n-4) with a(n)=n+1 for n<=3.at n=23A139763
• Second differences of Jacobsthal sequence A001045, pairs with even and odd indices swapped.at n=25A140505
• a(n) = (2^n + 2*(-1)^n - 6)/3.at n=24A153772
• Duplicate of A080674.at n=10A155721
• a(n) = (2^n - (-1)^n - 3)/3.at n=24A167030
• Decimal representation of the n-th iteration of the "Rule 133" elementary cellular automaton starting with a single ON (black) cell.at n=12A267457