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A077494 a(n) = smallest k such that the digit sum of 7k is n. 2
143, 3, 16, 2, 6, 1, 5, 9, 4, 8, 12, 7, 11, 24, 28, 14, 27, 67, 71, 57, 97, 128, 114, 127, 257, 414, 427, 557, 714, 997, 857, 1257, 1414, 1427, 4257, 2857, 5714, 8427, 8557, 9857, 11427, 14257, 12857, 28557, 55714, 42857, 71427, 85714, 99857, 112857, 128557 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Table of n, a(n) for n=2..52.

FORMULA

A077493(n)/7

MATHEMATICA

sk7[n_]:=Module[{k=1}, While[Total[IntegerDigits[7k]]!=n, k++]; k]; Array[ sk7, 60, 2] (* Harvey P. Dale, Apr 07 2014 *)

CROSSREFS

Cf. A069532, A069534, A077493.

Sequence in context: A283638 A235457 A200557 * A217142 A306090 A296887

Adjacent sequences:  A077491 A077492 A077493 * A077495 A077496 A077497

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy, Nov 07 2002

EXTENSIONS

Corrected and extended by Ray Chandler, Aug 03 2003

STATUS

approved

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Last modified December 5 10:45 EST 2019. Contains 329751 sequences. (Running on oeis4.)