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A134072
Concatenation of A000204 Lucas numbers (beginning at 1) in reverse order.
3
1, 31, 431, 7431, 117431, 18117431, 2918117431, 472918117431, 76472918117431, 12376472918117431, 19912376472918117431, 32219912376472918117431, 52132219912376472918117431, 84352132219912376472918117431
OFFSET
1,2
COMMENTS
Indices of prime terms are {2, 3, 5, 11, ...}. Primes are listed in A134071 = {31, 431, 117431, 19912376472918117431, ...}.
LINKS
Eric Weisstein's World of Mathematics, Lucas Number
Eric Weisstein's World of Mathematics, Smarandache Sequences
MATHEMATICA
Module[{nn=20, lnos}, lnos=LucasL[Range[nn]]; Table[FromDigits[Flatten[ IntegerDigits/@ Reverse[Take[lnos, n]]]], {n, nn}]] (* Harvey P. Dale, Jul 27 2015 *)
CROSSREFS
Cf. A000204 (Lucas numbers).
Cf. A130774 (concatenation of Lucas numbers).
Cf. A019523 (concatenation of Fibonacci numbers).
Cf. A038399 (concatenation of first n nonzero Fibonacci numbers in reverse order).
Cf. A134069 (primes in A038399).
Cf. A134070 (primes in A130774).
Cf. A134071 (primes in A134072).
Sequence in context: A274202 A352606 A089561 * A134071 A278964 A010836
KEYWORD
nonn,base
AUTHOR
Alexander Adamchuk, Oct 06 2007
EXTENSIONS
Edited by Charles R Greathouse IV, Apr 26 2010
STATUS
approved