

A122459


Triangular array of sums of two odd primes.


1



8, 14, 12, 20, 18, 18, 26, 24, 24, 24, 34, 34, 30, 30, 30, 44, 42, 38, 40, 36, 36, 50, 48, 48, 48, 44, 46, 42, 62, 58, 54, 54, 54, 54, 50, 52, 70, 66, 66, 64, 60, 60, 60, 60, 60, 76, 76, 74, 72, 72, 70, 66, 66, 70, 68, 86, 84, 80, 82, 80, 78, 78, 76, 76, 74, 78, 100, 94, 90, 90
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,1


LINKS

Table of n, a(n) for n=1..70.


FORMULA

T(n,k) = p(k)+p(2n+1k) for k=1,2,...,n, where p(1)=3, p(2)=5, ... are the odd primes.


EXAMPLE

First six rows:
8
14 12
20 18 18
26 24 24 24
34 34 30 30 30
44 42 38 40 36 36
Row 3 is formed from the first 6 odd primes:
3 5 7 11 13 17 > 3+17 5+13 7+11


CROSSREFS

Sequence in context: A220393 A109847 A260059 * A092537 A226799 A236295
Adjacent sequences: A122456 A122457 A122458 * A122460 A122461 A122462


KEYWORD

nonn,tabl


AUTHOR

Clark Kimberling, Sep 08 2006


STATUS

approved



