53143

Appears in sequences

• n written in fractional base 7/5.at n=38A024642
• Expansion of the g.f. x/((1+2x)(1-x-x^2)).at n=17A084179
• Number of walks of length 2n between two nodes at distance 2 in the cycle graph C_10.at n=8A095930
• a(n) = Sum_{k >= 0} binomial(n,5*k).at n=18A139398
• a(n) = Sum_{ k >= 0} binomial(n,5*k+3).at n=18A139748
• Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1000-1000-1111 pattern in any orientation.at n=13A147092
• a(n) = Sum_{k=0..n} binomial(5*n+3,5*k).at n=3A345457
• a(n) = Sum_{k=0..n} binomial(2*n,5*k).at n=9A387844
• a(n) = Sum_{k=0..n} binomial(3*n,5*k).at n=6A387847
• a(n) = Sum_{k=0..n} binomial(4*n+2,5*k).at n=4A387905