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A138844
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Concatenation of initial and final digits of n-th positive Fibonacci number.
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5
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11, 11, 22, 33, 55, 88, 13, 21, 34, 55, 89, 14, 23, 37, 60, 97, 17, 24, 41, 65, 16, 11, 27, 48, 75, 13, 18, 31, 59, 80, 19, 29, 38, 57, 95, 12, 27, 39, 66, 15, 11, 26, 47, 73, 10, 13, 23, 46, 79, 15, 24, 39, 53, 82, 15, 27, 32, 59, 91, 10, 21, 41, 62, 13, 15, 28, 43, 71, 14
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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a(15) = 60 because the 15th positive Fibonacci number is 610 and the concatenation of initial and final digits of 610 is 60.
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MAPLE
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a:= n-> (f-> parse(cat(f[1], f[-1])))(""||(combinat[fibonacci](n))):
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MATHEMATICA
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FromDigits[Join[{IntegerDigits[#][[1]]}, {IntegerDigits[#][[-1]]}]]&/@ Fibonacci[Range[70]] (* Harvey P. Dale, Jun 15 2018 *)
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CROSSREFS
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KEYWORD
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base,easy,nonn
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AUTHOR
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STATUS
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approved
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