A221867 Let m = A153022(n); a(n) = (1 + sum_{i=1..m} prime(i)^2)/(1+m).

54, 218, 222054, 669806, 155593313228, 31860927184920, 37843679840313254, 5349233671440437948, 65075392901385088766, 102744428793110424984, 251471854505406311064463, 1074272348712875302655077, 1114427338015137279788981

Offset

1,1

Links

Table of n, a(n) for n=1..13.

Example

For n=2, m=10, a(2) = 2398/11=218.

Crossrefs

Cf. A007504, A045345, A171399, A050247, A050248, A024450, A111441, A217599, A217600, A122140, A223936, A223937, A024525, A153022.

Sequence in context: A187299 A288626 A124007 * A248209 A245830 A102838

Adjacent sequences: A221864 A221865 A221866 * A221868 A221869 A221870

Keyword

nonn

Author

Robert Price, Apr 10 2013

Extensions

Definition corrected by N. J. A. Sloane, Apr 20 2013

Status

approved