Number of compositions of n where the difference between largest and smallest parts equals six.

Terms

a(0) =0a(1) =0a(2) =2a(3) =3a(4) =12a(5) =23a(6) =61a(7) =135a(8) =306a(9) =676a(10) =1487a(11) =3217a(12) =6931a(13) =14832a(14) =31564a(15) =66844a(16) =141021a(17) =296460a(18) =621290a(19) =1298416a(20) =2706869a(21) =5630554a(22) =11688444a(23) =24219318a(24) =50099741a(25) =103475201a(26) =213410807a(27) =439563765a(28) =904260858a(29) =1858097728