A264988 The left edge of A263267.

0, 1, 3, 5, 7, 13, 17, 19, 23, 27, 29, 31, 35, 37, 41, 43, 51, 53, 57, 59, 61, 65, 67, 71, 73, 77, 79, 143, 149, 151, 155, 157, 161, 163, 173, 177, 179, 181, 185, 191, 193, 199, 203, 209, 211, 215, 219, 223, 231, 233, 237, 239, 241, 249, 251, 263, 267, 269, 271, 277, 285, 291, 293, 299, 303, 315, 317, 321, 327, 333, 335, 337, 341, 347, 349, 357, 359, 369, 517, 531, 535, 523, 527

Offset

0,3

Comments

The first point where the sequence is nonmonotonic is the dip from a(80) = 535 to a(81) = 523.

Links

Antti Karttunen, Table of n, a(n) for n = 0..10001

Formula

a(0) = 0; for n >= 1, a(n) = A263267(A263260(n-1)).

Other identities. For all n >= 0:

A155043(a(n)) = n.

a(A262508(n)) = A262509(n) = A263269(A262508(n)). [In case A262508 and A262509 are infinite sequences.]

Prog

(Scheme)
(define (A264988 n) (if (zero? n) n (A263267 (A263260 (- n 1)))))

Crossrefs

Cf. A263260, A262508, A262509.

The left edge of irregular table A263267.

Cf. A263269 (the other edge).

Differs from A261089 for the first time at n=69, where a(69) = 333, while A261089(69) = 331.

Sequence in context: A339501 A008996 A261089 * A031163 A106119 A333541

Adjacent sequences: A264985 A264986 A264987 * A264989 A264990 A264991

Keyword

nonn

Author

Antti Karttunen, Nov 29 2015

Status

approved