Number of compositions of n such that the first part is 1 and the second differences of the parts are in {-4,...,4}.
A239554
Number of compositions of n such that the first part is 1 and the second differences of the parts are in {-4,...,4}.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =4a(5) =8a(6) =15a(7) =28a(8) =52a(9) =97a(10) =183a(11) =344a(12) =647a(13) =1219a(14) =2295a(15) =4322a(16) =8140a(17) =15338a(18) =28899a(19) =54449a(20) =102588a(21) =193297a(22) =364219a(23) =686272a(24) =1293113a(25) =2436562a(26) =4591090a(27) =8650808a(28) =16300370a(29) =30714116
External references
- oeis: A239554