A117928 Triangle read by rows: T(n,k) = smallest prime of the form (k+1)*prime(n) + k*i for some i>0, 0<=k<n.

2, 3, 7, 5, 11, 17, 7, 17, 23, 31, 11, 23, 37, 47, 59, 13, 29, 41, 61, 73, 83, 17, 37, 53, 71, 89, 107, 131, 19, 41, 59, 79, 103, 139, 139, 173, 23, 47, 71, 101, 127, 163, 167, 191, 223, 29, 59, 89, 131, 149, 179, 227, 239, 269, 317, 31, 67, 97, 127, 163, 191, 223, 269

Offset

1,1

Comments

T(n,0) = A000040(n); T(n,1) = A059786(n) for n>1.

Links

Robert Israel, Table of n, a(n) for n = 1..10011(rows 1 to 141, flattened)

Maple

T:= proc(n, k) local x;
  for x from (k+1)*ithprime(n) by k do
    if isprime(x) then return x fi
  od
end proc:
for n from 1 to 10 do
  seq(T(n, k), k=0..n-1)
od; # Robert Israel, Nov 23 2020

Crossrefs

Sequence in context: A297929 A221858 A139317 * A333086 A359504 A064011

Adjacent sequences: A117925 A117926 A117927 * A117929 A117930 A117931

Keyword

nonn,tabl

Author

Reinhard Zumkeller, Apr 03 2006

Status

approved