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1, 45, 2025, 91125, 4100625, 184528125, 8303765625, 373669453125, 16815125390625, 756680642578125, 34050628916015625, 1532278301220703125, 68952523554931640625, 3102863559971923828125, 139628860198736572265625
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| The compositions of n in which each natural number is colored by one of p different colors are called p-colored compositions of n. For n>=1, a(n) equals the number of 45-colored compositions of n such that no adjacent parts have the same color. - Milan Janjic, Nov 17 2011
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LINKS
| T. D. Noe, Table of n, a(n) for n=0..100
Tanya Khovanova, Recursive Sequences
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FORMULA
| G.f.: 1/(1-45*x). [From Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Nov 24 2008]
a(n)=45^n; a(n)=45*a(n-1) a(0)=1 [From Vincenzo Librandi, Nov 21 2010]
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PROG
| (MAGMA)[45^n: n in [0..20]] [From Vincenzo Librandi, Nov 21 2010]
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CROSSREFS
| Sequence in context: A170726 A170764 A121009 * A095658 A109941 A035097
Adjacent sequences: A009986 A009987 A009988 * A009990 A009991 A009992
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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