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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row n ends when a composite number is found.

LINKS

Table of n, a(n) for n=1..82.

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

Cf. A186071 A185682, A185684, A185685, A185687.

Sequence in context: A087556 A082268 A087557 * A299780 A297873 A298136

Adjacent sequences: A186069 A186070 A186071 * A186073 A186074 A186075

KEYWORD

nonn,base,tabf

AUTHOR

Michel Lagneau, Feb 11 2011

STATUS

approved

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Last modified February 3 15:25 EST 2023. Contains 360035 sequences. (Running on oeis4.)