A069102 a(1) = 1; a(2) = 1; a(n) = Prime[n-1] + Prime[n-2] if n > 2.

1, 1, 5, 8, 12, 18, 24, 30, 36, 42, 52, 60, 68, 78, 84, 90, 100, 112, 120, 128, 138, 144, 152, 162, 172, 186, 198, 204, 210, 216, 222, 240, 258, 268, 276, 288, 300, 308, 320, 330, 340, 352, 360, 372, 384, 390, 396, 410, 434, 450, 456, 462, 472, 480, 492, 508

Offset

1,3

Links

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

Example

a(3) = Prime[2] + Prime[1] = 3 + 2 = 5.

Mathematica

Join[{1, 1}, Total/@Partition[Prime[Range[60]], 2, 1]] (* Harvey P. Dale, Feb 01 2024 *)

Prog

(PARI) print1("1, 1, "):for(n=1, 100, print1(prime(n)+prime(n+1)", "))

Crossrefs

Cf. A001043, A011974.

Sequence in context: A359353 A360404 A362243 * A001043 A118775 A025001

Adjacent sequences: A069099 A069100 A069101 * A069103 A069104 A069105

Keyword

nonn

Author

Joseph L. Pe, Apr 06 2002

Extensions

More terms from Ralf Stephan, Mar 20 2003

Status

approved