217666

Appears in sequences

• T(2n-1,n-1), T given by A026568.at n=9A026577
• T(n,[ n/2 ]), T given by A026568.at n=19A026579
• a(0)=0: a(n)=A002865(2*n)+A002865(2*n+1), n>=1.at n=29A182844