Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A001027
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A001027 Powers of 18.
(Formerly M5062 N2192)
+0
8
1, 18, 324, 5832, 104976, 1889568, 34012224, 612220032, 11019960576, 198359290368, 3570467226624, 64268410079232, 1156831381426176, 20822964865671168, 374813367582081024, 6746640616477458432, 121439531096594251776, 2185911559738696531968, 39346408075296537575424, 708235345355337676357632, 12748236216396078174437376 (list; graph; listen)
OFFSET

0,2

REFERENCES

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

P. J. Cameron, Sequences realized by oligomorphic permutation groups, J. Integ. Seqs. Vol. 3 (2000), #00.1.5.

INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 282

Tanya Khovanova, Recursive Sequences

S. Plouffe, Approximations de S\'{e}ries G\'{e}n\'{e}ratrices et Quelques Conjectures, Dissertation, Universit\'{e} du Qu\'{e}bec \`{a} Montr\'{e}al, 1992.

S. Plouffe, 1031 Generating Functions and Conjectures, Universit\'{e} du Qu\'{e}bec \`{a} Montr\'{e}al, 1992.

Y. Puri and T. Ward, Arithmetic and growth of periodic orbits, J. Integer Seqs., Vol. 4 (2001), #01.2.1.

FORMULA

G.f.: 1/(1-18x), e.g.f.: exp(18x)

MAPLE

A001027:=-1/(-1+18*z); [S. Plouffe in his 1992 dissertation.]

PROGRAM

sage: from sage.combinat.sloane_functions import recur_gen2b sage: it =recur_gen2b(1, n/3, n/3, 0, lambda n: 0) sage: [it.next() for i in range(18)] - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jul 16 2008

(Other) sage: [lucas_number1(n, 18, 0) for n in xrange(1, 17)]# [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Apr 29 2009]

CROSSREFS

Sequence in context: A091045 A158532 A049660 this_sequence A041145 A041614 A166787

Adjacent sequences: A001024 A001025 A001026 this_sequence A001028 A001029 A001030

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

EXTENSIONS

More terms from James A. Sellers (sellersj(AT)math.psu.edu), Sep 19 2000

More terms from Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 06 2009

page 1

Search completed in 0.002 seconds

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified November 24 23:16 EST 2009. Contains 167481 sequences.


AT&T Labs Research