Convolution of A055852 with A011782.

Terms

a(0) =0a(1) =1a(2) =8a(3) =43a(4) =190a(5) =743a(6) =2668a(7) =8989a(8) =28814a(9) =88720a(10) =264224a(11) =765088a(12) =2162624a(13) =5986304a(14) =16268800a(15) =43499264a(16) =114629120a(17) =298147840a(18) =766361600a(19) =1948794880a(20) =4907171840a(21) =12245598208a(22) =30305419264a(23) =74425892864a(24) =181481635840a(25) =439603953664