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A107622
Primes plus alternately 2 and 3.
1
4, 6, 7, 10, 13, 16, 19, 22, 25, 32, 33, 40, 43, 46, 49, 56, 61, 64, 69, 74, 75, 82, 85, 92, 99, 104, 105, 110, 111, 116, 129, 134, 139, 142, 151, 154, 159, 166, 169, 176, 181, 184, 193, 196, 199, 202, 213, 226, 229, 232, 235, 242, 243, 254, 259, 266, 271, 274, 279
OFFSET
1,1
FORMULA
A107622(n) = prime(n) + (3 - mod(n, 2)).
MATHEMATICA
A107622[n_]:= Prime[n] + (3 - Mod[n, 2]) (* From Zak Seidov *)
Total[#]&/@Partition[Riffle[Prime[Range[100]], {2, 3}], 2] (* Harvey P. Dale, Dec 14 2010 *)
CROSSREFS
Cf. A107620, A107621, 107623.
Sequence in context: A286485 A363189 A277572 * A049306 A358731 A023635
KEYWORD
easy,nonn
AUTHOR
Zak Seidov, May 18 2005
STATUS
approved