A139374 Digit sum of Lucas numbers.

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

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