Number of compositions of n such that the first part is 1 and the second differences of the parts are in {-9,...,9}.
A239559
Number of compositions of n such that the first part is 1 and the second differences of the parts are in {-9,...,9}.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =4a(5) =8a(6) =16a(7) =32a(8) =63a(9) =125a(10) =248a(11) =491a(12) =973a(13) =1929a(14) =3819a(15) =7571a(16) =15010a(17) =29749a(18) =58971a(19) =116904a(20) =231735a(21) =459378a(22) =910649a(23) =1805210a(24) =3578545a(25) =7093916a(26) =14062567a(27) =27876856a(28) =55261542a(29) =109547385
External references
- oeis: A239559