87996

Appears in sequences

• Diagonal sums of number triangle A107030.at n=13A107031
• Number of nX5 0..1 arrays with no element equal to more than two of its horizontal, vertical and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.at n=9A280601
• G.f.: Sum_{k>=1} x^k/(1+x^k) * Product_{k>=1} (1+x^k)/(1-x^k).at n=26A305101