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A271511
a(n) = (p+1)*(p+2)/2 where p is the n-th prime.
2
6, 10, 21, 36, 78, 105, 171, 210, 300, 465, 528, 741, 903, 990, 1176, 1485, 1830, 1953, 2346, 2628, 2775, 3240, 3570, 4095, 4851, 5253, 5460, 5886, 6105, 6555, 8256, 8778, 9591, 9870, 11325, 11628, 12561, 13530, 14196, 15225, 16290, 16653, 18528, 18915, 19701
OFFSET
1,1
COMMENTS
Subsequence of A253145.
LINKS
MATHEMATICA
Table[(Prime[n]^2 + 3 Prime[n] + 2) / 2, {n, 50}]
PROG
(Magma) [(p+1)*(p+2) / 2: p in PrimesUpTo(200)];
(PARI) lista(nn) = forprime(p=2, nn, print1((p+1)*(p+2)/2, ", ")); \\ Altug Alkan, Apr 09 2016
CROSSREFS
Cf. A253145.
Sequence in context: A372295 A058549 A363675 * A287993 A220035 A083285
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Apr 09 2016
STATUS
approved