OFFSET
1,1
COMMENTS
The greatest number in row k is 2*k + 4, thus consecutive rows identify consecutive even numbers (sums of two primes).
To get the n-th row: copy (1...n) of A090368, reverse, and add together.
When primes meet primes we get the maximum values. When primes or prime factors meet prime factors, we get lesser values. (Spot checked. Still empirical.)
EXAMPLE
Triangle begins:
{ 6}, <--- copy (1,1) of A090368, add together
{ 8, 8}, <--- copy (1,2) of A090368, reverse, and add together
{10, 10, 10}, <--- copy (1,3) of A090368, reverse, and add together
{ 6, 12, 12, 6},
{14, 8, 14, 8, 14},
{16, 16, 10, 10, 16, 16},
{ 6, 18, 18, 6, 18, 18, 6}, <=== differences from A316859 begin here
{20, 8, 20, 14, 14, 20, 8, 20},
{22, 22, 10, 16, 22, 16, 10, 22, 22},
{ 6, 24, 24, 6, 24, 24, 6, 24, 24, 6},
{26, 8, 26, 20, 14, 26, 14, 20, 26, 8, 26},
{ 8, 28, 10, 22, 28, 16, 16, 28, 22, 10, 28, 8}
MATHEMATICA
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Fred Daniel Kline, Jul 15 2018
STATUS
approved