82803

Appears in sequences

• Number of tilings of a 10 X n rectangle using integer-sided square tiles of area > 1.at n=16A226374
• a(n) = 1*2*3*4 - 5*6*7*8 + 9*10*11*12 - 13*14*15*16 + ... - (up to n).at n=20A319544