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A345277
Sums of 3 consecutive even-indexed primes.
0
23, 39, 61, 85, 109, 133, 157, 185, 211, 239, 269, 297, 321, 351, 383, 421, 453, 487, 517, 547, 573, 615, 651, 691, 719, 753, 785, 815, 845, 885, 921, 965, 1003, 1045, 1081, 1115, 1153, 1189, 1227, 1263, 1297, 1333, 1363, 1399, 1433, 1473, 1515, 1565, 1619, 1667, 1703, 1739
OFFSET
1,1
FORMULA
a(n) = prime(2n) + prime(2n+2) + prime(2n+4).
EXAMPLE
39 is in the sequence since it is the sum of 3 consecutive even-indexed primes as 7 + 13 + 19 = 39, where 7 is the 4th prime, 13 is the 6th prime and 19 is the 8th prime..
MATHEMATICA
Table[Prime[2 n] + Prime[2 n + 2] + Prime[2 n + 4], {n, 80}]
CROSSREFS
Cf. A345069.
Sequence in context: A282712 A134754 A134755 * A209985 A244323 A337871
KEYWORD
nonn
AUTHOR
Wesley Ivan Hurt, Jun 12 2021
STATUS
approved