A098209 a(n) = A067275(n+1)^2 - 1.

0, 48, 4488, 444888, 44448888, 4444488888, 444444888888, 44444448888888, 4444444488888888, 444444444888888888, 44444444448888888888, 4444444444488888888888, 444444444444888888888888

Offset

0,2

Comments

Certain functions of near or generalized repdigits provide interesting digit patterns like e.g: -1+(666666667)^2=444444444888888888.

Links

Table of n, a(n) for n=0..12.

Crossrefs

Cf. A067275, A096507.

Sequence in context: A004034 A134164 A270253 * A208793 A174755 A269419

Adjacent sequences: A098206 A098207 A098208 * A098210 A098211 A098212

Keyword

nonn

Author

Labos Elemer, Oct 20 2004

Extensions

Definition corrected by Georg Fischer, Jun 27 2020

Status

approved