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A139374 Digit sum of Lucas numbers. 3
2, 1, 3, 4, 7, 2, 9, 11, 11, 13, 6, 19, 7, 8, 15, 14, 11, 16, 27, 25, 16, 23, 21, 26, 20, 28, 21, 22, 25, 29, 36, 20, 38, 40, 24, 28, 34, 26, 33, 23, 38, 34, 54, 43, 52, 41, 30, 62, 47, 46, 39, 49, 43, 47, 45, 47, 47, 58, 33, 73, 43, 53, 33, 68, 56, 70, 45, 43 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Irene Sermon, Table of n, a(n) for n = 0..10000

FORMULA

a(n) = A007953(A000032(n)). - Michel Marcus, Jul 13 2015

EXAMPLE

15127 is the 20th Lucas number (A000032(20)) with digit sum 16, so a(20)=16.

MATHEMATICA

Table[Total[IntegerDigits[LucasL[n]]], {n, 0, 100}] (* T. D. Noe, Oct 28 2013 *)

PROG

(MAGMA) [&+Intseq(Lucas(n)): n in [0..80]]; // Vincenzo Librandi, Jul 13 2015

CROSSREFS

Cf. A000032, A004090, A007953.

Sequence in context: A060214 A259773 A030133 * A111958 A192439 A160187

Adjacent sequences:  A139371 A139372 A139373 * A139375 A139376 A139377

KEYWORD

nonn,base

AUTHOR

Parthasarathy Nambi, Jun 08 2008

STATUS

approved

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Last modified February 22 06:17 EST 2018. Contains 299430 sequences. (Running on oeis4.)