Numbers k such that k is a square and remains a square when its leading digit is increased by one.
A067225
Numbers k such that k is a square and remains a square when its leading digit is increased by one.
Terms
- a(0) =576a(1) =2025a(2) =11025a(3) =57600a(4) =202500a(5) =342225a(6) =950625a(7) =1102500a(8) =3515625a(9) =5760000a(10) =9272025a(11) =11390625a(12) =20250000a(13) =34222500a(14) =95062500a(15) =110250000a(16) =196700625a(17) =351562500a(18) =576000000a(19) =927202500a(20) =1139062500a(21) =2025000000a(22) =3422250000a(23) =5613755625a(24) =5909765625a(25) =9506250000a(26) =11025000000a(27) =19670062500
External references
- oeis: A067225