Number of compositions of n with difference 3 between the number of odd parts and the number of even parts, both counted without multiplicity.
A242843
Number of compositions of n with difference 3 between the number of odd parts and the number of even parts, both counted without multiplicity.
Terms
- a(0) =6a(1) =12a(2) =26a(3) =54a(4) =104a(5) =194a(6) =357a(7) =590a(8) =1012a(9) =1814a(10) =3137a(11) =5990a(12) =11400a(13) =22864a(14) =46715a(15) =97788a(16) =206639a(17) =438654a(18) =930092a(19) =1969748a(20) =4147412a(21) =8696479a(22) =18137872a(23) =37638970a(24) =77738200a(25) =159832004a(26) =327315948a(27) =667736364a(28) =1357690562a(29) =2751972885
External references
- oeis: A242843