A134496 - OEIS

A134496

Numbers that are not lunar pseudoprimes.

100, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156

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OFFSET

1,1

COMMENTS

A number n is a lunar pseudoprime if it has no lunar divisors with length in the range 2, 3, ..., len(n)-1.

So the present sequence consists of the numbers which do have a lunar divisor of length in the range 2, 3, ..., len(n)-1.

Computed using David Applegate's programs.

LINKS

Table of n, a(n) for n=1..48.

D. Applegate, C program for lunar arithmetic and number theory [Note: we have now changed the name from "dismal arithmetic" to "lunar arithmetic" - the old name was too depressing]

D. Applegate, M. LeBrun and N. J. A. Sloane, Dismal Arithmetic [Note: we have now changed the name from "dismal arithmetic" to "lunar arithmetic" - the old name was too depressing]

Index entries for sequences related to dismal (or lunar) arithmetic

EXAMPLE

100 = 10*10.

CROSSREFS

Cf. A087062, etc.

Sequence in context: A369636 A352440 A204589 * A191752 A165406 A135603

Adjacent sequences: A134493 A134494 A134495 * A134497 A134498 A134499

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane, Aug 15 2010

STATUS

approved