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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A152569 Terms in A005229 occuring exactly 3 times. 0
 30, 45, 54, 66, 78, 93, 97, 113, 118, 135, 142, 143, 163, 171, 195, 205, 211, 235, 247, 278, 297, 310, 339, 355, 379, 401, 429, 432, 455, 490, 510, 519, 524, 548, 555, 578, 618, 627, 640, 646, 654, 658, 668, 734, 746, 759, 790, 797, 834, 846, 852, 875, 890 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS MATHEMATICA aa[1] = aa[2] = 1; aa[n_] := aa[n] = aa[aa[n - 2]] + aa[n - aa[n - 2]]; ta2000 = Table[aa[n], {n, 2000}]; re3 = Reap[Do[If[Count[ta2000, k] == 3, Sow[k]], {k, 1379}]][[2, 1]] CROSSREFS A005229 a(1)=a(2)=1; for n>2, a(n)=a(a(n-2))+a(n-a(n-2)). Sequence in context: A242445 A062385 A164803 * A114944 A075290 A281919 Adjacent sequences:  A152566 A152567 A152568 * A152570 A152571 A152572 KEYWORD nonn AUTHOR Zak Seidov, Dec 08 2008 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 May 25 16:33 EDT 2020. Contains 334595 sequences. (Running on oeis4.)