1/4 of the number of paths that are made of alternate vertical and horizontal 4*n consecutive prime (> 2 and < prime(4*n+2)) steps. (Each path begins and ends at the same point but is allowed to intersect itself.)

A292700

1/4 of the number of paths that are made of alternate vertical and horizontal 4*n consecutive prime (> 2 and < prime(4*n+2)) steps. (Each path begins and ends at the same point but is allowed to intersect itself.)

Terms

    a(0) =0a(1) =0a(2) =0a(3) =2a(4) =4a(5) =40a(6) =756a(7) =8466a(8) =70664a(9) =788240a(10) =11086299a(11) =114208465a(12) =1536869680a(13) =19129734630a(14) =228346732944

External references