A134735 - OEIS

A134735

Primes followed by the difference from the next prime.

2, 1, 3, 2, 5, 2, 7, 4, 11, 2, 13, 4, 17, 2, 19, 4, 23, 6, 29, 2, 31, 6, 37, 4, 41, 2, 43, 4, 47, 6, 53, 6, 59, 2, 61, 6, 67, 4, 71, 2, 73, 6, 79, 4, 83, 6, 89, 8, 97, 4, 101, 2, 103, 4, 107, 2, 109, 4, 113, 14, 127, 4, 131, 6, 137, 2

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

Omar E. Pol, Determinacion geometrica de los numeros primos y perfectos.

FORMULA

If n is odd then a(n) = A000040((n+1)/2) else a(n) = A001223(n/2).

MATHEMATICA

With[{pr=Prime[Range[40]]}, Riffle[pr, Differences[pr]]] (* Harvey P. Dale, Jul 17 2020 *)

PROG

(Haskell)

import Data.List (transpose)

a134735 n = a134735_list !! (n-1)

a134735_list = concat $ transpose [a000040_list, a001223_list]

-- Reinhard Zumkeller, Dec 12 2012

CROSSREFS

Prime numbers: A000040. Differences between consecutive primes: A001223.

Cf. A219606.

Sequence in context: A105602 A111079 A165006 * A240867 A242363 A050360

Adjacent sequences: A134732 A134733 A134734 * A134736 A134737 A134738

KEYWORD

easy,nonn

AUTHOR

Omar E. Pol, Nov 11 2007

STATUS

approved