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A065342 Triangle of sum of two primes: p(n)+p(k) with n >= k >= 1. 6
4, 5, 6, 7, 8, 10, 9, 10, 12, 14, 13, 14, 16, 18, 22, 15, 16, 18, 20, 24, 26, 19, 20, 22, 24, 28, 30, 34, 21, 22, 24, 26, 30, 32, 36, 38, 25, 26, 28, 30, 34, 36, 40, 42, 46, 31, 32, 34, 36, 40, 42, 46, 48, 52, 58, 33, 34, 36, 38, 42, 44, 48, 50, 54, 60, 62, 39, 40, 42, 44, 48 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Reinhard Zumkeller, First 125 rows of triangle, flattened

Index entries for sequences related to Goldbach conjecture

FORMULA

a(n, k) =2*A065305(n, k) [but note different offset]

EXAMPLE

Sequence starts 2+2; 3+2, 3+3; 5+2, 5+3, 5+5; etc. i.e. 4; 5,6; 7,8,10; ...

PROG

(Haskell)

import Data.List (inits)

a065342 n k = a065342_tabl !! (n-1) !! (k-1)

a065342_row n = a065342_tabl !! (n-1)

a065342_tabl = zipWith (map . (+)) a000040_list $ tail $ inits a000040_list

-- Reinhard Zumkeller, Aug 02 2015, Jan 30 2012

CROSSREFS

Cf. A052147 (left edge), A100484 (right edge), A000040.

Cf. A087112.

Cf. A065305.

Sequence in context: A084991 A099070 A288658 * A231369 A251392 A076597

Adjacent sequences:  A065339 A065340 A065341 * A065343 A065344 A065345

KEYWORD

nonn,tabl

AUTHOR

Henry Bottomley, Oct 30 2001

STATUS

approved

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Last modified March 21 04:59 EDT 2019. Contains 321364 sequences. (Running on oeis4.)