97740

Appears in sequences

• Number of invertible circulant (0,1) matrices over the reals that have even determinant.at n=17A086479
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 1, 1), (1, 0, -1), (1, 1, 1)}.at n=10A149273
• Irregular triangle read by rows: Numbers of unbranched k-5-catafusenes.at n=56A323944