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A266419 Odd nonludic numbers. 3
9, 15, 19, 21, 27, 31, 33, 35, 39, 45, 49, 51, 55, 57, 59, 63, 65, 69, 73, 75, 79, 81, 85, 87, 93, 95, 99, 101, 103, 105, 109, 111, 113, 117, 123, 125, 129, 133, 135, 137, 139, 141, 145, 147, 151, 153, 155, 159, 163, 165, 167, 169, 171, 177, 183, 185, 187, 189, 191, 195, 197, 199, 201, 203, 205, 207, 213, 215 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..10220

FORMULA

Other identities. For all n >= 1:

a(n) = 1 + 2*A266410(n).

PROG

(Scheme, with Antti Karttunen's IntSeq-library)

(define A266419 (MATCHING-POS 1 1 (lambda (n) (and (odd? n) (zero? (A192490 n))))))

CROSSREFS

Intersection of A005408 and A192607.

Cf. A192490, A266410, A237126.

Cf. also A071904, A266420.

Sequence in context: A118236 A230306 A070876 * A161163 A058211 A038599

Adjacent sequences:  A266416 A266417 A266418 * A266420 A266421 A266422

KEYWORD

nonn

AUTHOR

Antti Karttunen, Jan 28 2016

STATUS

approved

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Last modified April 21 07:53 EDT 2019. Contains 322327 sequences. (Running on oeis4.)