Number of compositions (ordered partitions) of n such that some part is repeated consecutively 4 times and no part is repeated consecutively more than 4 times.
A091618
Number of compositions (ordered partitions) of n such that some part is repeated consecutively 4 times and no part is repeated consecutively more than 4 times.
Terms
- a(0) =1a(1) =0a(2) =2a(3) =4a(4) =10a(5) =22a(6) =46a(7) =101a(8) =218a(9) =466a(10) =991a(11) =2093a(12) =4405a(13) =9232a(14) =19288a(15) =40169a(16) =83416a(17) =172806a(18) =357170a(19) =736710a(20) =1516714a(21) =3117133a(22) =6396116a(23) =13105012a(24) =26814264a(25) =54795330a(26) =111842771a(27) =228030558a(28) =464439943a(29) =945029466
External references
- oeis: A091618