Number of compositions of n with first part 1 and no equal adjacent parts; this is column 1 of the array in A096568.
A096569
Number of compositions of n with first part 1 and no equal adjacent parts; this is column 1 of the array in A096568.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =2a(4) =2a(5) =5a(6) =9a(7) =14a(8) =25a(9) =46a(10) =78a(11) =136a(12) =242a(13) =419a(14) =733a(15) =1291a(16) =2251a(17) =3938a(18) =6905a(19) =12073a(20) =21129a(21) =37001a(22) =64741a(23) =113304a(24) =198344a(25) =347126a(26) =607532a(27) =1063387a(28) =1861149a(29) =3257410
External references
- oeis: A096569