This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A264978 Self-inverse permutation of nonnegative integers: a(n) = A263273(8*n)/8. 9
 0, 1, 2, 3, 8, 5, 6, 7, 4, 9, 10, 17, 24, 26, 14, 15, 23, 11, 18, 29, 20, 21, 25, 16, 12, 22, 13, 27, 28, 19, 30, 71, 44, 51, 62, 35, 72, 89, 53, 78, 80, 41, 42, 68, 32, 45, 86, 59, 69, 77, 50, 33, 65, 38, 54, 83, 56, 87, 74, 47, 60, 61, 34, 63, 88, 52, 75, 79, 43, 48, 70, 31, 36, 85, 58, 66, 76, 49, 39, 67, 40, 81 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS Note that n=13 is the first point where this involution does not preserve the parity as a(13) = 26. LINKS Antti Karttunen, Table of n, a(n) for n = 0..7381 FORMULA a(n) = A263273(8*n)/8. a(n) = A263272(4*n)/4. a(n) = A264974(2*n)/2. Other identities. For all n >= 0: a(3*n) = 3*a(n). PROG (Scheme, three different variants) (define (A264978 n) (/ (A263273 (* 8 n)) 8)) (define (A264978 n) (/ (A263272 (* 4 n)) 4)) (define (A264978 n) (/ (A264974 (* 2 n)) 2)) CROSSREFS Cf. A263273, A263272, A264974. Sequence in context: A100208 A277972 A222243 * A268675 A268385 A093928 Adjacent sequences:  A264975 A264976 A264977 * A264979 A264980 A264981 KEYWORD nonn AUTHOR Antti Karttunen, Dec 06 2015 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified August 23 00:58 EDT 2019. Contains 326211 sequences. (Running on oeis4.)