A180333 - OEIS

A180333

Triangle in which row n has n semiprimes such that (p+1)(q+1) is the same for each semiprime pq and (p+1)(q+1) is as small as possible.

4, 14, 15, 46, 51, 55, 94, 115, 119, 121, 382, 497, 517, 527, 529, 718, 807, 895, 979, 1003, 1007, 1438, 1795, 1883, 1969, 2033, 2047, 2059, 958, 1077, 1195, 1253, 1343, 1349, 1357, 1363, 5758, 7195, 7909, 8143, 8189, 8257, 8339, 8413, 8453, 13438

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OFFSET

1,1

COMMENTS

This sequence was inspired by A180328, but there the semiprime pq is assumed to consist of distinct primes p and q. The value of (p+1)(q+1) for each row is in A180334.

LINKS

T. D. Noe and Zak Seidov, Rows n=1..36 of triangle, flattened

CROSSREFS

Sequence in context: A204541 A020157 A101237 * A030364 A044967 A298126

Adjacent sequences: A180330 A180331 A180332 * A180334 A180335 A180336

KEYWORD

tabl,nonn

AUTHOR

Zak Seidov and T. D. Noe, Sep 08 2010

STATUS

approved