Number of colored compositions of n using all colors of a 2-set such that all parts have different color patterns and the patterns for parts i are sorted and have i colors (in arbitrary order).
A327768
Number of colored compositions of n using all colors of a 2-set such that all parts have different color patterns and the patterns for parts i are sorted and have i colors (in arbitrary order).
Terms
- a(0) =0a(1) =0a(2) =3a(3) =18a(4) =60a(5) =210a(6) =798a(7) =2462a(8) =7891a(9) =25148a(10) =84173a(11) =257558a(12) =810924a(13) =2515962a(14) =7706020a(15) =24261554a(16) =73746402a(17) =224417982a(18) =683672754a(19) =2057559942a(20) =6177146990a(21) =18671429714a(22) =55589344618a(23) =165403412230a(24) =491940143015
External references
- oeis: A327768