127620

Appears in sequences

• Number of (n+2) X 4 0..1 matrices with each 3 X 3 subblock idempotent.at n=21A224553
• Expansion of q^(-2/5) * (r(q) - r(q^11))^12 in powers of q where r() is the Rogers-Ramanujan continued fraction.at n=16A285580