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!)
 A106577 Indices n of perfect squares n^2 which are both the sum and the difference of two primes. 12
 2, 3, 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 26, 28, 30, 32, 33, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 110, 112, 114, 116, 117, 118, 120, 122 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS FORMULA a(n) = SQRT(A106575(n)). EXAMPLE a(3)=4 because the third square which is the sum and the difference of two primes (16=4^2) is the 4th one in the succession of the perfect squares (thus: index 4). CROSSREFS Cf. A106544-A106548, A106562-A106564, A106571, A106573-A106575. Sequence in context: A047229 A094229 A067290 * A068577 A225731 A246352 Adjacent sequences:  A106574 A106575 A106576 * A106578 A106579 A106580 KEYWORD easy,nonn AUTHOR Alexandre Wajnberg, May 09 2005 EXTENSIONS Extended by Ray Chandler, May 12 2005 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 13 00:04 EDT 2021. Contains 344980 sequences. (Running on oeis4.)