The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A261094 Left inverse of A219640: If n = A219640(k) for some k, then a(n) = k, otherwise zero. 4
 0, 1, 2, 0, 3, 4, 0, 5, 6, 7, 0, 0, 8, 9, 10, 0, 11, 12, 0, 0, 13, 14, 15, 0, 16, 17, 0, 18, 19, 20, 0, 0, 0, 21, 22, 23, 0, 24, 25, 0, 26, 27, 28, 0, 0, 29, 30, 31, 0, 32, 33, 0, 0, 0, 34, 35, 36, 0, 37, 38, 0, 39, 40, 41, 0, 0, 42, 43, 44, 0, 45, 46, 0, 0, 47, 48, 49, 0, 50, 51, 0, 52, 53, 54, 0, 0, 0, 0, 55, 56, 57, 0, 58, 59, 0, 60, 61, 62 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS Antti Karttunen, Table of n, a(n) for n = 0..10946 FORMULA a(n) = A261092(n) * A261093(n). Other identities. For all n >= 0: a(A219640(n)) = n. PROG (Scheme) (define (A261094 n) (* (A261092 n) (A261093 n))) CROSSREFS Cf. A219640, A261092, A261093. Sequence in context: A181289 A229032 A117909 * A091538 A013584 A307320 Adjacent sequences:  A261091 A261092 A261093 * A261095 A261096 A261097 KEYWORD nonn AUTHOR Antti Karttunen, Aug 08 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 January 23 10:36 EST 2020. Contains 331171 sequences. (Running on oeis4.)