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 A020732 Pisot sequence T(4,7). 0
 4, 7, 12, 20, 33, 54, 88, 143, 232, 376, 609, 986, 1596, 2583, 4180, 6764, 10945, 17710, 28656, 46367, 75024, 121392, 196417, 317810, 514228, 832039, 1346268, 2178308, 3524577, 5702886, 9227464, 14930351, 24157816, 39088168, 63245985, 102334154, 165580140 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS FORMULA Fib(n+5)-1. a(n) = 2a(n-1) - a(n-3). MATHEMATICA Join[{a=4, b=7}, Table[c=a+b+1; a=b; b=c, {n, 0, 60}]] [From Vladimir Joseph Stephan Orlovsky, 22 Nov 2010] CROSSREFS Subsequence of A000071. See A008776 for definitions of Pisot sequences. Sequence in context: A097536 A022809 A188554 * A117949 A010901 A187211 Adjacent sequences:  A020729 A020730 A020731 * A020733 A020734 A020735 KEYWORD nonn AUTHOR STATUS approved

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