A209838 -id:A209838 - cp's OEIS frontend

A209837 Integers n such that for all i > n the largest prime factor of product(i+k, {k,0,13}) exceeds the largest prime factor of product(n+k, {k,0,13}).

3, 5, 9, 15, 17, 23, 27, 29, 33, 39, 45, 47, 53, 57, 59, 65, 69, 75, 83, 87, 89, 93, 95, 99, 113, 117, 123, 125, 135, 137, 143, 149, 153, 159, 165, 167, 177, 179, 183, 185, 197, 209, 1331, 1332, 48504, 48508, 87163, 416318, 780357, 1845848, 3177027, 3177029, 4309597, 12369422

Offset: 1

Andrey V. Kulsha, Mar 14 2012

nonn

Heuristics show that these terms are valid, but a strict proof is yet to be done.

Andrey V. Kulsha, Table of n, a(n) for n = 1..72

Cf. A200570, A209838.

A209839 Integers n such that for all i > n the largest prime factor of product(i+k, {k,0,15}) exceeds the largest prime factor of product(n+k, {k,0,15}).

Original entry on oeis.org

1, 3, 7, 13, 15, 21, 25, 27, 31, 37, 43, 45, 51, 55, 57, 63, 67, 73, 81, 85, 87, 91, 93, 97, 111, 115, 121, 123, 133, 135, 141, 147, 151, 157, 163, 165, 175, 177, 181, 183, 195, 207, 211, 213, 217, 223, 225, 235, 241, 247, 253, 1330, 1383, 4179, 4180, 4181, 5243, 12985, 48506, 87161, 211750

Offset: 1

Andrey V. Kulsha, Mar 14 2012

nonn

Heuristics show that these terms are valid, but a strict proof is yet to be done.

Andrey V. Kulsha, Table of n, a(n) for n = 1..80

Cf. A209838.

cp's OEIS Frontend

A209837 Integers n such that for all i > n the largest prime factor of product(i+k, {k,0,13}) exceeds the largest prime factor of product(n+k, {k,0,13}).

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