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Search: id:A070312
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| A070312 |
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a(1) = a(2) = 1; a(n) = a(n-1) + concatenation of a(n-2) and a(n-1). |
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+0
1
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| 1, 1, 12, 124, 12248, 12424496, 1224824848992, 124244962449649697984, 1224824848992248489924899299395968, 1242449624496496979842449649697984496979849798598791936
(list; graph; listen)
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OFFSET
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1,3
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EXAMPLE
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a(4) = a(3) + concatenation of a(2) and a(3) = 12 + 112 = 124.
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MATHEMATICA
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a[n_] := (a[n - 1] + FromDigits[ Join[ IntegerDigits[ a[n - 2]], IntegerDigits[ a[n - 1]]]]); a[1] = a[2] = 1; Table[ a[n], {n, 1, 10}]
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CROSSREFS
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Sequence in context: A016134 A045507 A155595 this_sequence A153427 A061114 A015792
Adjacent sequences: A070309 A070310 A070311 this_sequence A070313 A070314 A070315
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KEYWORD
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base,nonn
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AUTHOR
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Joseph L. Pe (joseph_l_pe(AT)hotmail.com), May 11 2002
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EXTENSIONS
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Edited by Robert G. Wilson v (rgwv(AT)rgwv.com), May 14 2002
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