OFFSET
1,5
EXAMPLE
Triangle begins:
1
1, 1
1, 2, 1
1, 3, 3, 1
1, 3, 4, 3, 1
1, 4, 5, 5, 4, 1
1, 4, 7, 9, 7, 4, 1
1, 5, 9, 12, 12, 9, 5, 1
1, 5, 10, 17, 20, 17, 10, 5, 1
1, 5, 12, 24, 31, 31, 24, 12, 5, 1
1, 5, 15, 31, 47, 55, 47, 31, 15, 5, 1
1, 6, 17, 39, 67, 90, 90, 67, 39, 17, 6, 1
PROG
(PARI) t(n, k) = primepi(nextprime(binomial(n, k)+1)) \\ Michel Marcus, Apr 13 2013
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Juri-Stepan Gerasimov, Mar 20 2010
STATUS
approved