A063175 - OEIS

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A063175

Composites for which the row of the prime-composite array (A063173) includes the leftmost element of a zero-only diagonal (A067677).

15, 21, 39, 51, 55, 75, 91, 99, 105, 121, 159, 165, 169, 187, 195, 249, 265, 285, 309, 325, 327, 339, 351, 385, 441, 471, 481, 489, 511, 517, 531, 595, 609, 615, 625, 685, 789, 805, 841, 879, 891, 909, 915, 939, 951, 955, 987, 999, 1027, 1035, 1045, 1057

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..52.

N. Fernandez, The prime-composite array, B(m,n) and the Borve conjectures

EXAMPLE

The 12th composite is 21. In the prime-composite array (A063173), all of the elements in the diagonal containing T(12,1) are 0. So 21 is in the sequence.

CROSSREFS

Cf. A063173, A063174, A063176, A067677.

Sequence in context: A254365 A335674 A349096 * A367103 A325658 A331628

Adjacent sequences: A063172 A063173 A063174 * A063176 A063177 A063178

KEYWORD

nonn

AUTHOR

Neil Fernandez, Jul 09 2001

EXTENSIONS

Edited and extended by Robert G. Wilson v, Feb 07 2002

STATUS

approved