A026392 T(n,[ n/2 ]), where T is the array in A026386.

1, 2, 4, 8, 17, 34, 75, 150, 339, 678, 1558, 3116, 7247, 14494, 34016, 68032, 160795, 321590, 764388, 1528776, 3650571, 7301142, 17501619, 35003238, 84179877, 168359754, 406020930, 812041860, 1963073865, 3926147730

Offset: 1

Author

Clark Kimberling

Keywords

• nonn

Links

• Paul Barry, Extensions of Riordan Arrays and Their Applications, Mathematics (2025) Vol. 13, No. 2, 242. See p. 15.

Crossrefs

Cf. A026378, A085362.

Programs

Maple

A026392 := proc(n)
    A026386(n,floor(n/2)) ;
end proc: # R. J. Mathar, Feb 10 2015

Formula

Conjecture: (n+1)*a(n) +2*(n-1)*a(n-1) +2*(-3*n+1)*a(n-2) +4*(-3*n+7)*a(n-3) +5*(n-3)*a(n-4) +10*(n-5)*a(n-5)=0. - R. J. Mathar, Feb 10 2015

Extensions

Offset corrected. R. J. Mathar, Feb 10 2015