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A228190 a(n) = sum_{i=1..n} prime(i) + product_{i=1..n} prime(i). 1
4, 11, 40, 227, 2338, 30071, 510568, 9699767, 223092970, 6469693359, 200560490290, 7420738135007, 304250263527448, 13082761331670311, 614889782588491738, 32589158477190045111, 1922760350154212639510, 117288381359406970983771, 7858321551080267055879658 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..200

FORMULA

a(n) = A002110(n+1) + A007504(n).

EXAMPLE

The first term of this sequence is the sum of the first 1 primes plus the product of the first 1 primes. Thus, 2+2 = 4.

The second term of this sequence is the sum of the first 2 primes plus the product of the first 2 primes. Thus, (2+3)+(2*3) = 11.

Etc..

MATHEMATICA

Table[Sum[Prime[i], {i, n}] + Product[Prime[i], {i, n}], {n, 30}] (* T. D. Noe, Aug 16 2013 *)

CROSSREFS

Sequence in context: A214142 A077236 A327025 * A289283 A152532 A121096

Adjacent sequences:  A228187 A228188 A228189 * A228191 A228192 A228193

KEYWORD

nonn,easy

AUTHOR

Derek Orr, Aug 15 2013

STATUS

approved

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Last modified November 22 00:32 EST 2019. Contains 329383 sequences. (Running on oeis4.)