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A088239 Triangle read by rows: T(n,k) = number of primes not less than n-k and not greater n+k, 0<=k<n. 0
0, 1, 2, 1, 2, 3, 0, 2, 3, 4, 1, 1, 3, 4, 4, 0, 2, 2, 3, 4, 5, 1, 1, 2, 2, 4, 5, 6, 0, 1, 1, 3, 3, 5, 6, 6, 0, 0, 2, 2, 4, 4, 5, 6, 7, 0, 1, 1, 3, 3, 4, 4, 6, 7, 8, 1, 1, 2, 2, 3, 3, 5, 5, 7, 8, 8, 0, 2, 2, 2, 2, 4, 4, 6, 6, 7, 8, 9, 1, 1, 2, 2, 3, 3, 5, 5, 6, 6, 8, 9, 9, 0, 1, 1, 3, 3, 4, 4, 5, 5, 7, 7 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

T(n,0) = A010051(n); T(n,n-1) = A000720(2*n-1).

LINKS

Table of n, a(n) for n=1..102.

CROSSREFS

Sequence in context: A141455 A292627 A113125 * A130070 A273516 A082501

Adjacent sequences:  A088236 A088237 A088238 * A088240 A088241 A088242

KEYWORD

nonn,tabl

AUTHOR

Reinhard Zumkeller, Nov 03 2003

STATUS

approved

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Last modified July 16 11:09 EDT 2020. Contains 335784 sequences. (Running on oeis4.)