A349732 -id:A349732 - cp's OEIS frontend

A349733 Composite numbers that are missing from A349194.

26, 34, 38, 39, 46, 51, 57, 58, 62, 68, 69, 74, 76, 82, 85, 86, 87, 92, 93, 94, 95, 102, 106, 111, 114, 115, 116, 118, 119, 121, 122, 123, 124, 129, 133, 134, 138, 141, 142, 143, 145, 146, 148, 152, 155, 158, 159, 161, 164, 166, 169, 171, 172, 174, 177, 178

Offset: 1

Bernard Schott, Nov 28 2021

Since no prime >= 11 is a term in A349194, only composite numbers are listed here.

			There does not exist an integer 'du' such that 26 = d*(d+u), so 26 is a term.

Rémy Sigrist, PARI program for A349733

Cf. A349194, A349732.

Equals A349865 \ A350061.

PARI
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See Links section.
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More terms from Rémy Sigrist, Nov 28 2021

A349864 Smallest k such that A349278(k) = n, or 0 if no such k exists.

Original entry on oeis.org

1, 2, 3, 4, 5, 6, 7, 8, 9, 32, 0, 13, 0, 52, 23, 62, 0, 33, 0, 14, 43, 92, 0, 24, 0, 0, 63, 34, 0, 15, 0, 44, 83, 0, 25, 54, 0, 0, 0, 35, 0, 16, 0, 74, 45, 0, 0, 26, 0, 55, 0, 94, 0, 36, 65, 17, 0, 0, 0, 46, 0, 0, 27, 422, 85, 56, 0, 0, 0, 37, 0, 18, 0, 0, 0, 0, 47, 76, 0, 28, 603, 0, 0, 57, 0, 0, 0, 38, 0, 19

Offset: 1

Bernard Schott, Dec 03 2021

Composite numbers m for which a(m) = 0 are in A349865.

			a(10) = 32 since 2*(2+3) = 10 and no integer du < 32 gives u*(u+d) = 32.

Cf. A349278, A349865.

Cf. A349732 (similar, with first digits).

If p prime >= 11, a(p) = 0.

a(64) and a(81) corrected by Michel Marcus, Dec 03 2021.

cp's OEIS Frontend

A349733 Composite numbers that are missing from A349194.

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