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

 Please make a donation to keep the OEIS running. We are now in our 56th year. In the past year we added 10000 new sequences and reached almost 9000 citations (which often say "discovered thanks to the OEIS"). Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A126199 a(n) = prime(n)*prime(n+1) + prime(n) + prime(n+1). 4
 11, 23, 47, 95, 167, 251, 359, 479, 719, 959, 1215, 1595, 1847, 2111, 2591, 3239, 3719, 4215, 4895, 5327, 5919, 6719, 7559, 8819, 9995, 10607, 11231, 11879, 12539, 14591, 16895, 18215, 19319, 20999, 22799, 24015, 25911, 27551, 29231, 31319, 32759 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS FORMULA a(n) = A180617(n) - 1. - Omar E. Pol, Dec 08 2019 MATHEMATICA f[n_] := Block[{p = Prime[n], q = Prime[n + 1]}, p*q + p + q]; Array[f, 42] - Robert G. Wilson v, Mar 09 2007 Times@@#+Total[#]&/@Partition[Prime[Range[50]], 2, 1] (* Harvey P. Dale, Nov 01 2017 *) CROSSREFS Cf. A000040, A001043, A006094, A126148, A096342, A180617. Sequence in context: A217047 A139834 A100558 * A096342 A066179 A217566 Adjacent sequences:  A126196 A126197 A126198 * A126200 A126201 A126202 KEYWORD easy,nonn AUTHOR Jonathan Vos Post, Mar 08 2007 EXTENSIONS More terms from Robert G. Wilson v, Mar 09 2007 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 November 30 11:33 EST 2020. Contains 338799 sequences. (Running on oeis4.)