The number of edges inside a cross with width 3 and height n (see Comments in A331455 for definition) formed by the straight line segments mutually connecting all vertices and all points.
A330851
The number of edges inside a cross with width 3 and height n (see Comments in A331455 for definition) formed by the straight line segments mutually connecting all vertices and all points.
Terms
- a(0) =108a(1) =172a(2) =294a(3) =522a(4) =848a(5) =1352a(6) =2046a(7) =3032a(8) =4260a(9) =5958a(10) =8048a(11) =10806a(12) =14082a(13) =18070a(14) =22778a(15) =28646a(16) =35314a(17) =43436a(18) =52676a(19) =63370a(20) =75290a(21) =89330a(22) =104908a(23) =122816a(24) =142476a(25) =164644a(26) =188954a(27) =216686a(28) =246584a(29) =280386
External references
- oeis: A330851