68529

Appears in sequences

• Expansion of e.g.f. exp(sinh(x)*cosh(x)).at n=9A009229
• Expansion of sin(sin(x)*cos(x)).at n=4A009481
• Number of (n+1)X(n+1) -7..7 symmetric matrices with every 2X2 subblock having sum zero and one or three distinct values.at n=10A211443