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Search: id:A107975
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| A107975 |
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First differences give the same sequence written as a string of individual digits. |
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+0
5
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| 5, 10, 11, 11, 12, 13, 14, 15, 16, 18, 19, 22, 23, 27, 28, 33, 34, 40, 41, 49, 50, 59, 61, 63, 65, 68, 70, 77, 79, 87, 90, 93, 96, 100, 104, 104, 108, 109, 113, 122, 127, 127, 132, 141, 147, 148, 154, 157, 163, 168, 174, 182, 189, 189, 196, 203, 210, 219, 227, 234, 243
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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5.10.11.11.12.13.14.15.16.18 ... <- sequence
.5..1..0..1..1..1..1..1..2 ... <- first differences are the sequence's digits.
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MATHEMATICA
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a[1] = 5; a[n_] := a[n] = a[n - 1] + Flatten[ Table[ IntegerDigits[ a[i]], {i, n - 1}]][[n - 1]]; Table[ a[n], {n, 61}] (from Robert G. Wilson v (rgwv(AT)rgwv.com), Jun 15 2005)
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CROSSREFS
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Cf. A100787, A107974, A107975, A107976, A107977 for "seeds" 1, 3, 5, 7 and 9.
Sequence in context: A101866 A100884 A032242 this_sequence A106792 A134002 A028760
Adjacent sequences: A107972 A107973 A107974 this_sequence A107976 A107977 A107978
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KEYWORD
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base,easy,nonn
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AUTHOR
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Eric Angelini (eric.angelini(AT)kntv.be), Jun 12 2005
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EXTENSIONS
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Edited and extended by Robert G. Wilson v (rgwv(AT)rgwv.com), Jun 15 2005
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