login
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
OFFSET
1,1
LINKS
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. also A071904, A266420.
Sequence in context: A118236 A230306 A070876 * A161163 A058211 A038599
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jan 28 2016
STATUS
approved