This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A154382 The basic sequence using the Multi-Symbol Function with M()={+,-,*} indexed by prime numbers. 0
 0, 2, 6, 2, 10, 4, 28, 20, 180, 1800, 1789, 1777, 23101 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Multi-Symbol Function (MSF) : Define your own set of mathematical functions : M = {+,-,*} which have indices {0,1,2}. MSF is . . . . . . N . . . . -------- M(i % 3) ------ i . . . . -------- . . . . . i = 1 gives { 0 - 1 = -1, (1 % 3 => -) -1 * 2 = -2, (2 % 3 => *) -2 + 3 = 1, (3 % 3 => +) 1 - 4 = -3, (4 % 3 => -) -3 * 5 = -15, (5 % 3 => *) -9,-16,-128,-119,-129,-1419,...} where % means mod. Using M(p % 3) instead of M(i % 3) gives MSF = {0,2,6,2,10,4,28,20,180,1800,1789,1777,23101,...} where p = primes = {2,3,5,7,11,13,17,19,23,29,31,37,41,...}, giving M(p % 3)={*,+,*,-,*,-,*,-,*,*,-,-,*,...}. If M()={+} then MSF=Summation=I pounds . If M()={*} then MSF=Product= [unreadable nonascii omitted characters here] If M(i % 3)={+,*,!} then MSF includes itself and MSF={0,0,3,12,12!,12!+6,(12!+6)*7,[(12!+6)*7]!,...}. LINKS CROSSREFS Sequence in context: A002172 A126289 A200044 * A136762 A136697 A136761 Adjacent sequences:  A154379 A154380 A154381 * A154383 A154384 A154385 KEYWORD nonn,uned,obsc AUTHOR Michael J Crowe (mjcrowe(AT)tiscali.co.uk), Jan 08 2009 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 June 17 18:57 EDT 2019. Contains 324198 sequences. (Running on oeis4.)