A116964 - OEIS

A116964

Sum of all n-digit Lucas numbers.

17, 181, 2008, 22269, 143285, 1692737, 18772741, 208192888, 2308894509, 14856075365, 175506357617, 1946395332181, 21585855011608, 138889450176440, 1640808956134074, 18196850168753057, 201806160812417701, 2238064619105347768, 14400335971854080600, 170122354174067662074

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..20.

EXAMPLE

The sum of all 1-digit Lucas numbers is 17, so a(1) = 17.

The sum of all 2-digit Lucas numbers is 181, so a(2) = 181.

MATHEMATICA

Total/@Table[Select[Table[LucasL[n], {n, 0, 95}], IntegerLength[#]==i&], {i, 20}] (* Harvey P. Dale, Mar 31 2011 *)

nn = 20; t = Table[0, {nn}]; k = 0; While[luc = LucasL[k]; d = IntegerLength[luc]; d <= nn, t[[d]] = t[[d]] + luc; k++]; t (* T. D. Noe, Mar 31 2011 *)

CROSSREFS

Cf. A000032, A127390, A128823.

Sequence in context: A142214 A066521 A055904 * A167578 A181401 A243419

Adjacent sequences: A116961 A116962 A116963 * A116965 A116966 A116967

KEYWORD

nonn,base

AUTHOR

Parthasarathy Nambi, May 27 2007

EXTENSIONS

More terms from Harvey P. Dale, Mar 31 2011.

STATUS

approved