

A143344


First differences of A022941.


4



1, 3, 4, 6, 7, 8, 10, 11, 12, 13, 14, 16, 17, 18, 19, 20, 21, 23, 24, 25, 26, 27, 28, 29, 31, 32, 33, 34, 35, 36, 37, 38, 39, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 77
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OFFSET

1,2


COMMENTS

This is (essentially) the sequence c() mentioned in the definition of A022941.


LINKS

Nathaniel Johnston, Table of n, a(n) for n = 1..10000


MAPLE

a[1]:=1: a[2]:=2: c[1]:=3: for n from 2 to 70 do c[n]:=c[n1]+1: for k from 1 to n do if(c[n]<=a[k])then if(c[n]=a[k])then c[n]:=c[n]+1: fi: break: fi: od: a[n+1]:=a[n]+c[n1]: od: seq(c[n], n=1..70); # Nathaniel Johnston, May 01 2011


PROG

(Haskell)
import Data.List (delete)
a143344 n = a143344_list !! (n1)
a143344_list = zipWith () (tail a022941_list) a022941_list
 Reinhard Zumkeller, May 17 2013


CROSSREFS

Cf. A022941, A156031.
Sequence in context: A179872 A298644 A075747 * A007401 A275481 A234349
Adjacent sequences: A143341 A143342 A143343 * A143345 A143346 A143347


KEYWORD

nonn,easy


AUTHOR

N. J. A. Sloane, Nov 01 2009


EXTENSIONS

a(26), a(27) corrected by Nathaniel Johnston, May 01 2011


STATUS

approved



