219106

Appears in sequences

• Second crank moment minus second rank moment: M_2(n) - N_2(n) = 2*spt(n).at n=36A211982
• Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 or 00000011.at n=9A259721
• Irregular triangle, read by rows, of coefficients of polynomials that are the "nonstandard" factor of polynomials yielding the columns (up to sign) of triangle A290053, beginning with column 3.at n=41A290761