This site is supported by donations to The OEIS Foundation.

 Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing. Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A191590 a(n) is the genus of the modular curve associated to the principal congruence subgroup of level p(n), where p(n) is the n-th prime number. 0
 0, 0, 3, 26, 50, 133, 196, 375, 806, 1001, 1768, 2451, 2850, 3773, 5500, 7686, 8526, 11408, 13651, 14875, 18981, 22100, 27391, 35673, 40376, 42875, 48178, 50986, 56925, 81313, 89376, 102443, 107066, 132276, 137751, 155078, 173800, 187083, 208250, 230956, 238876, 281201 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,3 LINKS Jens Putzka, Aequivariante Signaturen und Darstellungen der Modulgruppe in der Kohomologie von Modulkurven, Master Thesis (2006), page 18. FORMULA a(n)=(prime(n)+2)*(prime(n)-3)*(prime(n)-5)/24. PROG (PARI) a(p)=(p+2)*(p-3)*(p-5)/24; forprime(p=3, 1000, print1(a(p), ", ")); CROSSREFS Sequence in context: A062181 A058993 A083109 * A177511 A294494 A048372 Adjacent sequences:  A191587 A191588 A191589 * A191591 A191592 A191593 KEYWORD nonn,easy AUTHOR Gaël Collinet, Jun 08 2011 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 December 8 12:29 EST 2019. Contains 329862 sequences. (Running on oeis4.)