168359754
domain: N
Appears in sequences
- a(n) = number of integer strings s(0),...,s(n) counted by array T in A026386 that have s(n)=0; also a(n) = T(2n,n).at n=12A026387
- T(n,[ n/2 ]), where T is the array in A026386.at n=25A026392
- Self-convolution of array T given by A026374.at n=13A026946
- Self-convolution of array T given by A026386.at n=13A026951
- a(0)=1; for n>0, a(n) = 2*5^(n-1) - (1/2)*Sum_{i=1..n-1} a(i)*a(n-i).at n=13A085362