A132403 Triangle read by rows: T(n,k) = nextprime( T(n-1,k) + T(n-1,k-1) ), where nextprime = A151800.

1, 2, 2, 3, 5, 3, 5, 11, 11, 5, 7, 17, 23, 17, 7, 11, 29, 41, 41, 29, 11, 13, 41, 71, 83, 71, 41, 13, 17, 59, 113, 157, 157, 113, 59, 17, 19, 79, 173, 271, 317, 271, 173, 79, 19, 23, 101, 257, 449, 593, 593, 449, 257, 101, 23, 29, 127, 359, 709, 1049, 1187, 1049, 709, 359, 127, 29

Offset

0,2

Comments

Each number is the smallest prime > the sum of the 2 numbers above (consider each line padded with 0 on each side).

Links

Table of n, a(n) for n=0..65.

Example

Triangle begins:
  1
  2....2
  3....5....3
  5...11...11....5
  7...17...23...17....7
  11..29...41...41...29...11
  13..41...71...83...71...41...13
  17..59..113..157..157..113...59...17
  19..79..173..271..317..271..173...79...19
  23.101..257..449..593..593..449..257..101...23
  29.127..359..709.1049.1187.1049..709..359..127..29
  31.157..487.1069.1759.2237.2237.1759.1069..487.157..31
  37.191..647.1559.2833.4001.4583.4001.2833.1559.647.191.37
  ...
First column is A008578.
Second column is A064337.

Crossrefs

Cf. A008578, A151800, A007318, A064337, A199333, A362034.

Sequence in context: A317160 A317043 A317697 * A209167 A299995 A113167

Adjacent sequences: A132400 A132401 A132402 * A132404 A132405 A132406

Keyword

easy,nonn,tabl

Author

Jonathan Vos Post, Nov 12 2007

Status

approved