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A110369 (Digit 1 repeated n times) + n. 2
2, 13, 114, 1115, 11116, 111117, 1111118, 11111119, 111111120, 1111111121, 11111111122, 111111111123, 1111111111124, 11111111111125, 111111111111126, 1111111111111127, 11111111111111128, 111111111111111129, 1111111111111111130 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Partial sums of A062397. - Klaus Purath, Mar 18 2021
LINKS
FORMULA
a(n) = A002275(n) + n. - Michel Marcus, Mar 04 2018
a(n) = (10^n - 1)/9 + n. - Klaus Purath, Mar 18 2021a(n) =
EXAMPLE
a(12) = 111111111111 + 12 = 111111111123.
MATHEMATICA
Table[FromDigits[PadRight[{}, n, 1]]+n, {n, 20}] (* Harvey P. Dale, May 15 2019 *)
PROG
(Sage) [gaussian_binomial(n, 1, 10)+n for n in range(1, 20)] # Zerinvary Lajos, May 29 2009
CROSSREFS
Cf. A002275 (repunits).
Sequence in context: A247153 A088604 A127891 * A212071 A258620 A209174
KEYWORD
base,easy,nonn
AUTHOR
Amarnath Murthy, Jul 24 2005
EXTENSIONS
More terms from Joshua Zucker, May 08 2006
An incorrect recurrence was deleted by N. J. A. Sloane, Sep 13 2009
STATUS
approved

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Last modified May 20 23:09 EDT 2024. Contains 372720 sequences. (Running on oeis4.)