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A186072
Irregular triangle, read by rows, of primes with suffix n and digits "1" prepended , otherwise 0.
2
11, 0, 13, 113, 0, 0, 0, 17, 0, 19, 0, 0, 0, 113, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 127, 0, 0, 0, 131, 0, 0, 0, 0, 0, 137, 0, 139, 0, 0, 0, 0, 0, 0, 0, 0, 0, 149, 0, 151, 1151, 0, 0, 0, 0, 0, 157, 0, 0, 0, 0, 0, 163, 1163, 0, 0, 0, 167, 0, 0, 0, 0, 0, 173, 0, 0, 0, 0, 0, 179
OFFSET
1,1
COMMENTS
Row n ends when a composite number is found.
EXAMPLE
for k=1..2 , a(3, k) = {13, 113} are in the sequence.
MAPLE
with(numtheory): for n from 1 to 100 do:a0:=n:id:=0:c:=0:for k from 1 to 20
while (id=0) do:d:=length(a0):a1:=10^d+a0:if type(a1, prime)=true then a0:=a1:printf(`%d,
`, a0):c:=c+1:else id:=1:fi:od:if c=0 then printf(`%d, `, 0):else fi:od:
CROSSREFS
KEYWORD
nonn,base,tabf
AUTHOR
Michel Lagneau, Feb 11 2011
STATUS
approved