

A181672


The odd terms (a1,a3,a5,...) are in an arithmetic progression (1,2,3,...), while the even terms (a2,a4,a6,...) give the number of letters of the given odd term.


0



1, 3, 2, 3, 3, 5, 4, 4, 5, 4, 6, 3, 7, 5, 8, 5, 9, 4, 10, 3, 11, 6, 12, 6, 13, 8, 14, 8, 15, 7, 16, 7, 17, 9, 18, 8, 19, 8, 20, 6, 21, 9, 22, 9, 23, 11, 24, 10, 25, 10, 26, 9, 27, 11, 28, 11, 29, 10, 30, 6, 31, 9, 32, 9, 33, 11, 34, 10
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OFFSET

1,2


LINKS

Table of n, a(n) for n=1..68.


FORMULA

a(2n1) = n.
a(2n) = A005589(n).


EXAMPLE

(ONE  3 letters, TWO  3 letters, THREE  5 letters, FOUR  4 letters, FIVE  4 letters...)


CROSSREFS

Sequence in context: A230010 A230847 A234300 * A125748 A058680 A070544
Adjacent sequences: A181669 A181670 A181671 * A181673 A181674 A181675


KEYWORD

nonn,word,easy


AUTHOR

Edwin F. Sampang, Nov 04 2010


EXTENSIONS

More terms from Nathaniel Johnston, Nov 15 2010


STATUS

approved



