A transform of floor((n+2)/2) with Hankel transform floor((n+2)/2)*(cos(Pi*n/2) + sin(Pi*n/2)).

A134389

A transform of floor((n+2)/2) with Hankel transform floor((n+2)/2)*(cos(Pi*n/2) + sin(Pi*n/2)).

Terms

    a(0) =1a(1) =2a(2) =5a(3) =11a(4) =24a(5) =51a(6) =108a(7) =226a(8) =472a(9) =979a(10) =2028a(11) =4182a(12) =8616a(13) =17694a(14) =36312a(15) =74340a(16) =152112a(17) =310659a(18) =634188a(19) =1292686a(20) =2633992a(21) =5360362a(22) =10905480a(23) =22163676a(24) =45032784a(25) =91417646a(26) =185539448a(27) =376279196

External references