A194219 Right part of the square of the n-th Kaprekar number.

0, 1, 25, 25, 1, 209, 209, 1, 1729, 1984, 4641, 2500, 2500, 5264, 1984, 1729, 1, 14336, 17284, 37444, 17284, 14336, 4641, 1, 122449, 126201, 148761, 152100, 165025, 217124, 221089, 227904, 229449, 237969, 248521, 248900, 250000, 250000, 248900, 248521

Offset: 1

Author

Reinhard Zumkeller, Aug 19 2011

Keywords

• nonn
• base

Comments

A194218(n) + a(n) = A006886(n) and

concatenation of A194218(n) and a(n) = A006886(n)^2.

Links

• Rosetta Code, Kaprekar numbers
• Eric Weisstein's World of Mathematics, Kaprekar Number
• Wikipedia, Kaprekar number

Programs

Haskell

See A194218.