Number of n-step four-sided prudent self-avoiding walks ending at the northwest corner of their box.

A191758

Number of n-step four-sided prudent self-avoiding walks ending at the northwest corner of their box.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =10a(4) =24a(5) =60a(6) =146a(7) =362a(8) =894a(9) =2220a(10) =5506a(11) =13686a(12) =34014a(13) =84620a(14) =210538a(15) =524074a(16) =1304662a(17) =3248652a(18) =8089768a(19) =20147228a(20) =50177160a(21) =124972192a(22) =311257258a(23) =775219392a(24) =1930719596a(25) =4808416726a(26) =11974790286a(27) =29820532540a(28) =74257690132

External references