Irregular triangle read by rows: T(n,k) (n >= 1, 2 <= k <= 2*n) = number of interior vertices in the n-th figure shown in A255011 (meaning the figure with 4n points on the perimeter) where k lines meet.
A334691
Irregular triangle read by rows: T(n,k) (n >= 1, 2 <= k <= 2*n) = number of interior vertices in the n-th figure shown in A255011 (meaning the figure with 4n points on the perimeter) where k lines meet.
Terms
- a(0) =1a(1) =20a(2) =8a(3) =1a(4) =204a(5) =32a(6) =8a(7) =0a(8) =1a(9) =616a(10) =152a(11) =20a(12) =8a(13) =4a(14) =0a(15) =1a(16) =2428a(17) =252a(18) =36a(19) =16a(20) =4a(21) =0a(22) =0a(23) =0a(24) =1a(25) =3968a(26) =572a(27) =156a(28) =72a(29) =16
External references
- oeis: A334691