This site is supported by donations to The OEIS Foundation.

"Email this user" was broken Aug 14 to 9am Aug 16. If you sent someone a message in this period, please send it again.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A076874 n - floor ( ( 4*n + 1 )^(1/2) ). 3
 0, 0, 1, 1, 2, 3, 3, 4, 5, 5, 6, 7, 8, 8, 9, 10, 11, 11, 12, 13, 14, 15, 15, 16, 17, 18, 19, 19, 20, 21, 22, 23, 24, 24, 25, 26, 27, 28, 29, 29, 30, 31, 32, 33, 34, 35, 35, 36, 37, 38, 39, 40, 41, 41, 42, 43, 44, 45, 46, 47, 48, 48, 49, 50, 51, 52, 53, 54, 55, 55, 56, 57, 58, 59 (list; graph; refs; listen; history; text; internal format)
 OFFSET 3,5 COMMENTS Conjecture: For n>=7, a(n)-2 is the maximum number of steps in a 2D self-avoiding random walk trapped after n steps having only 2 choices for the next step. a(n) >= A077484(n) + 2. LINKS Hugo Pfoertner, Results for the 2D Self-Trapping Random Walk MAPLE A076874:=n->n - floor((4*n + 1)^(1/2)); seq(A076874(n), n=3..50); # Wesley Ivan Hurt, Mar 01 2014 MATHEMATICA Table[n - Floor[(4 n + 1)^(1/2)], {n, 3, 50}] (* Wesley Ivan Hurt, Mar 01 2014 *) CROSSREFS Cf. A077483, A077484, A001411. Sequence in context: A248186 A248183 A049474 * A127041 A173023 A127039 Adjacent sequences:  A076871 A076872 A076873 * A076875 A076876 A076877 KEYWORD easy,nonn AUTHOR Hugo Pfoertner, Nov 24 2002 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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.