A138392 Hankel transform of A062992 with interpolated zeros.

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

Offset

0,2

Links

Table of n, a(n) for n=0..14.

Formula

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

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

Crossrefs

Sequence in context: A162127 A073987 A317802 * A152544 A280115 A264149

Adjacent sequences: A138389 A138390 A138391 * A138393 A138394 A138395

Keyword

easy,nonn

Author

Paul Barry, Mar 18 2008

Status

approved