Sum of end-to-end Manhattan distances over all self-avoiding walks on square lattice trapped after n steps.

A078800

Sum of end-to-end Manhattan distances over all self-avoiding walks on square lattice trapped after n steps.

Terms

    a(0) =1a(1) =4a(2) =21a(3) =72a(4) =271a(5) =858a(6) =2846a(7) =8632a(8) =26913a(9) =79504a(10) =238881a(11) =693210a(12) =2033133a(13) =5823100a(14) =16794540a(15) =47619222a(16) =135663289a(17) =381615476a(18) =1077064799a(19) =3010363236a(20) =8434161574a(21) =23448994128

External references