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A097586 Table T(n,n) read by rows: T(1,1)=0; then if n even T(n,1)=T(n-1,1)+2 and if n odd T(n,1)=T(n-2,1)+T(n-1,1)-1 then T(n,j)=T(n,j-1) + 2^floor((n+1)/2). 0
0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 1, 5, 9, 13, 17, 21, 25, 29, 33, 37, 3, 7, 11, 15, 19, 23, 27, 31, 35, 39, 3, 11, 19, 27, 35, 43, 51, 59, 67, 75, 5, 13, 21, 29, 37, 45, 53, 61, 69, 77, 7, 23, 39, 55, 71, 87, 103, 119, 135, 151, 9, 25, 41, 57, 73 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Integers > 1 appear exactly twice, 0 and 1 only once. Consecutive primes with gap 4 are consecutive in rows 3 or 4

LINKS

Table of n, a(n) for n=1..75.

CROSSREFS

Sequence in context: A061762 A136614 A245627 * A169805 A263042 A230099

Adjacent sequences:  A097583 A097584 A097585 * A097587 A097588 A097589

KEYWORD

base,nonn,tabl

AUTHOR

Pierre CAMI, Sep 20 2004

STATUS

approved

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Last modified November 19 06:26 EST 2019. Contains 329310 sequences. (Running on oeis4.)