Number of (1+1) X (n+1) arrays of permutations of 0..n*2+1 filled by rows with each element moved a city block distance of 0 1 or 2, and rows and columns in increasing lexicographic order.
A263507
Number of (1+1) X (n+1) arrays of permutations of 0..n*2+1 filled by rows with each element moved a city block distance of 0 1 or 2, and rows and columns in increasing lexicographic order.
Terms
- a(0) =8a(1) =48a(2) =204a(3) =770a(4) =2687a(5) =8559a(6) =25383a(7) =71498a(8) =193691a(9) =508996a(10) =1306369a(11) =3291584a(12) =8173381a(13) =20060419a(14) =48777993a(15) =117717414a(16) =282365804a(17) =673959638a(18) =1602152316a(19) =3796140809a(20) =8970338435a(21) =21150183227a(22) =49777148466a(23) =116976012851a(24) =274555052038a(25) =643757239647
External references
- oeis: A263507