Number of different quartets of 4 differents bemirps of n digits.

A123058

Number of different quartets of 4 differents bemirps of n digits.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =1a(6) =1a(7) =2a(8) =9a(9) =29a(10) =60a(11) =221a(12) =749a(13) =2560a(14) =9432a(15) =35685

External references