A089621 n^4 + n-th prime.

3, 19, 86, 263, 636, 1309, 2418, 4115, 6584, 10029, 14672, 20773, 28602, 38459, 50672, 65589, 83580, 105037, 130388, 160071, 194554, 234335, 279924, 331865, 390722, 457077, 531544, 614763, 707390, 810113, 923648, 1048707, 1186058

Offset

1,1

Comments

Sum of reciprocals = 0.40492582319615..

Links

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Mathematica

Table[n^4+Prime[n], {n, 40}] (* Harvey P. Dale, Oct 03 2020 *)

Prog

(PARI) primeppwr(n) = { sr=0; for(x=1, n, y=x^4+prime(x); print1(y", "); sr+=1./y; ); print(); print(sr) }

Crossrefs

Sequence in context: A240286 A163431 A167242 * A204256 A015528 A183384

Adjacent sequences: A089618 A089619 A089620 * A089622 A089623 A089624

Keyword

easy,nonn

Author

Cino Hilliard, Dec 31 2003

Status

approved