Number of compositions of n such that the first part is 1 and the second differences of the parts are in {-7,...,7}.
A239557
Number of compositions of n such that the first part is 1 and the second differences of the parts are in {-7,...,7}.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =4a(5) =8a(6) =16a(7) =31a(8) =61a(9) =120a(10) =235a(11) =460a(12) =901a(13) =1769a(14) =3471a(15) =6811a(16) =13367a(17) =26236a(18) =51497a(19) =101079a(20) =198399a(21) =389428a(22) =764384a(23) =1500372a(24) =2945008a(25) =5780612a(26) =11346484a(27) =22271478a(28) =43715623a(29) =85807323
External references
- oeis: A239557