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A039731 a(n)=MAX{p(n) mod q, where prime q < p(n)=n-th prime}. 3
1, 2, 2, 4, 6, 6, 8, 10, 12, 14, 18, 18, 20, 18, 24, 28, 30, 30, 34, 36, 38, 40, 42, 44, 48, 50, 48, 50, 54, 60, 64, 66, 68, 70, 72, 78, 80, 78, 84, 82, 84, 94, 96, 96, 98, 104, 110, 100, 102, 106, 112, 114, 124, 126, 126, 132, 134, 138 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

COMMENTS

Sequence lists the maxima of rows of triangle A207409. - Michel Marcus, Oct 01 2013

LINKS

Charles R Greathouse IV, Table of n, a(n) for n = 2..10000

PROG

(PARI) a(n) = {maxp = 0; for (i = 1, n-1, mp = prime(n) % prime(i); maxp = max(mp, maxp); ); maxp; } \\ Michel Marcus, Oct 01 2013

(PARI) P=primes(100); vector(#P, i, mx=0; for(j=1, i-1, mx=max(P[i]%P[j], mx)); mx)[2..#P] \\ Charles R Greathouse IV, Oct 01 2013

CROSSREFS

Sequence in context: A178883 A109832 A309075 * A005341 A137268 A008130

Adjacent sequences:  A039728 A039729 A039730 * A039732 A039733 A039734

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified April 8 07:59 EDT 2020. Contains 333313 sequences. (Running on oeis4.)