803760

Appears in sequences

• a(n) = 6*a(n-1) - a(n-2) + 2 with a(0) = 0, a(1) = 3.at n=8A001652
• Expansion of 4*x/((1+x)*(1-6*x+x^2)).at n=8A046729
• Expansion of 1/((1 - x)*(1 - 2*x - x^2)).at n=15A048739
• Number of 16 X n binary arrays with path of adjacent 1's from upper right corner to lower left corner.at n=1A069338
• Duplicate of A046729.at n=8A089498
• Expansion of g.f. (1-x-x^2)/(1-x-3*x^2-x^3).at n=17A097075
• a(n) = 2*a(n-1) + 2*a(n-3) + a(n-4), a(0) = 1, a(1) = 4, a(2) = 9, a(3) = 20.at n=15A111587
• Pythagorean triples of nearly isosceles triangle.at n=21A114336
• Row sums of A181657.at n=30A181658
• Numbers k where d/k reaches a new record, with d the distance from the k-th triangular number to the nearest square.at n=21A229117
• Pairs of integers (a,b) such a^2 + (a+1)^2 = b^2.at n=16A261116
• Triangle T(n,g) read by rows: Partition of the set of (2n-1)! circular permutations on 2n elements according to the minimal genus g of the surface in which one can immerse the non-simple closed curves with n crossings determined by those permutations.at n=13A264755
• Number of immersions of oriented circle into oriented sphere with n labeled double points.at n=5A268567
• Numbers k with property that there is an m = m(k) such that m(m+1)/2 divides k(k+1)/2 and m(k) > m(i) for all i < k.at n=35A309423