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A266399 a(n) = A188163(A088359(n)); positions where A004001 obtains unique values. 3
5, 9, 10, 17, 18, 19, 22, 33, 34, 35, 36, 39, 40, 43, 49, 65, 66, 67, 68, 69, 72, 73, 74, 77, 78, 81, 87, 88, 91, 97, 107, 129, 130, 131, 132, 133, 134, 137, 138, 139, 140, 143, 144, 145, 148, 149, 152, 158, 159, 160, 163, 164, 167, 173, 174, 177, 183, 193, 194, 197, 203, 213, 228, 257, 258, 259, 260, 261 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Numbers n for which A004001(n-1) < A004001(n) < A004001(n+1).

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..8192

FORMULA

a(n) = A188163(A088359(n)) = A088359(A088359(n)-1) = A188163(A188163(1+n)).

Other identities. For all n >= 1:

A004001(a(n)) = A088359(n).

PROG

(Scheme, two variants)

(define (A266399 n) (A088359 (- (A088359 n) 1)))

(define A266399 (MATCHING-POS 1 2 (lambda (n) (< (A004001 (- n 1)) (A004001 n) (A004001 (+ n 1)))))) ;; This one requires Antti Karttunen's IntSeq-library

CROSSREFS

Cf. A004001.

Subsequence of A088359 and A188163.

Cf. also A266188.

Sequence in context: A282757 A199718 A155470 * A164709 A212314 A136318

Adjacent sequences:  A266396 A266397 A266398 * A266400 A266401 A266402

KEYWORD

nonn

AUTHOR

Antti Karttunen, Jan 18 2016

STATUS

approved

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Last modified December 3 12:38 EST 2021. Contains 349463 sequences. (Running on oeis4.)