Start with a single triangle; at n-th generation add a triangle at each vertex, allowing triangles to overlap; sequence gives total population of triangles at n-th generation.
A061777
Start with a single triangle; at n-th generation add a triangle at each vertex, allowing triangles to overlap; sequence gives total population of triangles at n-th generation.
Terms
- a(0) =1a(1) =4a(2) =10a(3) =22a(4) =40a(5) =70a(6) =112a(7) =178a(8) =268a(9) =406a(10) =592a(11) =874a(12) =1252a(13) =1822a(14) =2584a(15) =3730a(16) =5260a(17) =7558a(18) =10624a(19) =15226a(20) =21364a(21) =30574a(22) =42856a(23) =61282a(24) =85852a(25) =122710a(26) =171856a(27) =245578a(28) =343876a(29) =491326
External references
- oeis: A061777