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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 (list; graph; refs; listen; history; text; internal format)
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[n-1]+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[n-1]: od: seq(c[n], n=1..70); # Nathaniel Johnston, May 01 2011

PROG

(Haskell)

import Data.List (delete)

a143344 n = a143344_list !! (n-1)

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

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Last modified November 13 21:28 EST 2019. Contains 329106 sequences. (Running on oeis4.)