Number of compositions of n such that the sum of the parts counted without multiplicities is equal to the sum of all multiplicities.
A243149
Number of compositions of n such that the sum of the parts counted without multiplicities is equal to the sum of all multiplicities.
Terms
- a(0) =1a(1) =1a(2) =0a(3) =0a(4) =4a(5) =3a(6) =4a(7) =0a(8) =11a(9) =31a(10) =70a(11) =177a(12) =242a(13) =382a(14) =482a(15) =874a(16) =1655a(17) =4440a(18) =10696a(19) =24390a(20) =49867a(21) =95850a(22) =172980a(23) =289229a(24) =492233a(25) =811753a(26) =1468084a(27) =2813206a(28) =5929361a(29) =12780690
External references
- oeis: A243149