Number of strings of numbers x(i=1..n) in 0..8 with sum i*x(i) equal to n*8.

Terms

a(0) =1a(1) =5a(2) =27a(3) =154a(4) =744a(5) =3226a(6) =12688a(7) =46037a(8) =155645a(9) =495251a(10) =1493647a(11) =4296714a(12) =11848026a(13) =31451899a(14) =80666519a(15) =200509690a(16) =484315994a(17) =1139426161a(18) =2616322539a(19) =5873891912a(20) =12914638982a(21) =27846986092a(22) =58961254653a(23) =122728579066a(24) =251399638554