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A098596 Length of the n-th term in the Roman numeral Look and Say sequence A098595. 2
1, 2, 3, 4, 3, 6, 9, 8, 10, 15, 24, 23, 29, 36, 49, 54, 62, 75, 92, 105, 115, 138, 161, 180, 202, 231, 268, 297, 331, 376, 429, 472, 524, 593, 666, 731, 815, 912, 1017, 1120, 1244, 1383, 1536, 1689, 1873, 2074, 2291, 2526, 2790, 3083, 3398, 3749, 4131, 4552, 5023 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Peter J. C. Moses, Table of n, a(n) for n = 1..1000

FORMULA

a(n)=length(A098595(n))

EXAMPLE

The 7th term in A098595 = 111115111 so a(7)=9.

MATHEMATICA

p={4, 8, 10, 10, 10, 10, 6, 2, -4, -8, -10, -10, -6, -9, -13, -14, -4, 8, 21, 28, 27, 18, 13, 23, 39, 50, 49, 43, 34, 26, 27, 35, 43, 40, 29, 15, 7, 3, 4, 9, 14, 14, 9, 4, 1};

q={-1, -2, -3, -2, 1, 4, 5, 3, -1, -4, -3, 1, 5, 5, 1, -4, -6, -3, 2, 5, 4, 0, -4, -5, -3, 0, 2, 2, 1};

gf=Fold[x #1+#2&, 0, p]/Fold[x #1+#2&, 0, q];

CoefficientList[Series[gf, {x, 0, 99}], x] (* Peter J. C. Moses, Jun 21 2013 *)

CROSSREFS

Cf. A098595. A005150 for original Look and Say sequence.

Sequence in context: A116991 A103634 A255046 * A217536 A058267 A048259

Adjacent sequences:  A098593 A098594 A098595 * A098597 A098598 A098599

KEYWORD

easy,less,nonn,base

AUTHOR

Mark Hudson (mrmarkhudson(AT)hotmail.com), Sep 17 2004

EXTENSIONS

More terms from David Wasserman, Feb 26 2008

STATUS

approved

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Last modified October 21 16:33 EDT 2018. Contains 316427 sequences. (Running on oeis4.)