A138392 Hankel transform of A062992 with interpolated zeros.

1, 3, 12, 128, 2048, 81920, 5242880, 805306368, 206158430208, 123145302310912, 126100789566373888, 295147905179352825856, 1208925819614629174706176, 11141460353568422474092118016, 182541686432865033815525261574144

Offset: 0

Author

Paul Barry, Mar 18 2008

Keywords

• easy
• nonn

Programs

Maple

A138392 := proc(n)
    2^(binomial(n+1,2)+0^n-1)*(2+floor((n+1)/2)-0^n) ;
end proc:
seq(%(n),n=0..13) ; # R. J. Mathar, Feb 23 2015

Formula

a(n)=2^(comb(n+1,2)+0^n-1)*(2+floor((n+1)/2)-0^n)