OFFSET
1,1
COMMENTS
PROG
(PARI) T = matrix( 19, 19, m, n, isprime((2*m+1)^n-2)) ;
A155897 = concat( vector( vecmin( matsize(T)), i, vector( i, j, T[j, i-j+1])))
CROSSREFS
KEYWORD
AUTHOR
M. F. Hasler, Feb 01 2009
STATUS
approved