A141101 - OEIS

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A141101

a(n) = prime(2*n) - 2*n.

1

1, 3, 7, 11, 19, 25, 29, 37, 43, 51, 57, 65, 75, 79, 83, 99, 105, 115, 125, 133, 139, 149, 153, 175, 179, 187, 197, 207, 213, 221, 231, 247, 251, 269, 279, 287, 299, 307, 319, 329, 339, 349, 357, 369, 373, 387, 397, 407, 423, 441, 455, 465, 471, 485, 491, 501

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..56.

FORMULA

a(n) = A031215(n) - A005843(n). - Michel Marcus, Feb 01 2019 [Corrected by Georg Fischer, Dec 13 2022]

a(n) = A014689(A005843(n)). - Michel Marcus, Dec 13 2022

EXAMPLE

a(1) = prime(2*1) - 1*2 = prime(2) - 2 = 3 - 2 = 1.

a(4) = prime(2*4) - 4*2 = prime(8) - 8 = 19 - 8 = 11.

MAPLE

p:= ithprime: a:= seq(p(2*n)-2*n, n=1..100); # D. S. McNeil, Mar 21 2009

PROG

(PARI) a(n) = prime(2*n) - 2*n; \\ Michel Marcus, Dec 13 2022

CROSSREFS

Cf. A005843, A031215, A014689.

Sequence in context: A231847 A105876 A354801 * A236632 A098379 A329482

Adjacent sequences: A141098 A141099 A141100 * A141102 A141103 A141104

KEYWORD

nonn

AUTHOR

Juri-Stepan Gerasimov, Jul 31 2008

EXTENSIONS

a(32), a(40) corrected and extended by D. S. McNeil, Mar 21 2009

STATUS

approved