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!)
 A172115 Partial sums of A001605 indices of prime Fibonacci numbers. 0
 3, 7, 12, 19, 30, 43, 60, 83, 112, 155, 202, 285, 416, 553, 912, 1343, 1776, 2225, 2734, 3303, 3874, 6845, 11568, 16955, 26266, 35943, 50374, 75935, 106692, 142691, 180202, 231035, 312874, 417785, 547806, 695897, 897004, 1294383, 1728164 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Primes in this sequence include a(1) = 3, a(2) = 7, a(4) = 19, a(6) = 43, a(8) = 83. Because the underlying sequence is hard, so is this, and so it is hard to determine if there is ever another such prime sum of indices of prime Fibonacci numbers. LINKS EXAMPLE a(20) = 3 + 4 + 5 + 7 + 11 + 13 + 17 + 23 + 29 + 43 + 47 + 83 + 131 + 137 + 359 + 431 + 433 + 449 + 509 + 569 = 3303. CROSSREFS Cf. A001605, A001578, A005478, A086597, A080345. Sequence in context: A039677 A011899 A002498 * A328655 A091369 A036698 Adjacent sequences:  A172112 A172113 A172114 * A172116 A172117 A172118 KEYWORD hard,nonn AUTHOR Jonathan Vos Post, Jan 25 2010 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 March 31 16:23 EDT 2020. Contains 333151 sequences. (Running on oeis4.)