The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A256234 Magic constants of 4 X 4 pandiagonal magic squares composed of consecutive primes. 5
 682775764735680, 47184892811061120, 50194833750826260, 70151123608154420, 76685404549625256, 93295105984206480, 94615738903617540, 123483356772380760, 141536742113504220, 211283804186719200, 214070508927033000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(1) = 682775764735680, minimal 4 X 4 pandiagonal magic squares of consecutive primes, see A245721. LINKS Dmitry Petukhov, Table of n, a(n) for n = 1..56 Discussion at the scientific forum dxdy.ru (in Russian) BOINC project to search all up to 2^64 Natalia Makarova, Pandiagonal squares of order 4 composed of consecutive prime numbers EXAMPLE a(2) = 47184892811061120: 11796223202765101 + 0 148 232 336 268 300 36 112 126 22 358 210 322 246 90 58 a(5) = 76685404549625256: 19171351137406219 + 0 100 112 168 142 138 30 70 78 22 190 90 160 120 48 52 CROSSREFS Cf. A166113 (3 X 3 square), A245721. Sequence in context: A321709 A338608 A088867 * A298821 A159042 A129935 Adjacent sequences: A256231 A256232 A256233 * A256235 A256236 A256237 KEYWORD nonn AUTHOR Dmitry Petukhov, Mar 20 2015 EXTENSIONS a(5) added by Dmitry Petukhov, Mar 25 2015 a(6), a(7) from an anonymous participant in the project, added by Natalia Makarova, Jul 16 2015 a(8) from Alexander Andreyev, added by Natalia Makarova, Mar 29 2016 a(9) from Alexander Andreyev, a(10) from an anonymous participant in the project, a(11) from Denis Ivanov, added by Natalia Makarova, Jun 13 2016 a(12)-a(18) are confirmed by BOINC project, Mar 19 2017 a(19)-a(32) are confirmed by BOINC project, Apr 06 2017 a(33)-a(56) are confirmed and added by BOINC project, May 17 2017 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified April 1 13:29 EDT 2023. Contains 361695 sequences. (Running on oeis4.)