Numbers k > 0 such that k^2 is a centered pentagonal number (A005891).
A129557
Numbers k > 0 such that k^2 is a centered pentagonal number (A005891).
Terms
- a(0) =1a(1) =4a(2) =34a(3) =151a(4) =1291a(5) =5734a(6) =49024a(7) =217741a(8) =1861621a(9) =8268424a(10) =70692574a(11) =313982371a(12) =2684456191a(13) =11923061674a(14) =101938642684a(15) =452762361241
External references
- oeis: A129557