The number of vertices 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.
A330850
The number of vertices 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) =45a(1) =69a(2) =119a(3) =219a(4) =357a(5) =575a(6) =871a(7) =1301a(8) =1815a(9) =2543a(10) =3435a(11) =4635a(12) =6023a(13) =7731a(14) =9727a(15) =12259a(16) =15087a(17) =18585a(18) =22543a(19) =27165a(20) =32215a(21) =38239a(22) =44899a(23) =52631a(24) =60979a(25) =70465a(26) =80815a(27) =92749a(28) =105511a(29) =120079
External references
- oeis: A330850