A345277 Sums of 3 consecutive even-indexed primes.

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

Links

Table of n, a(n) for n=1..52.

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

Adjacent sequences: A345274 A345275 A345276 * A345278 A345279 A345280

Keyword

nonn

Author

Wesley Ivan Hurt, Jun 12 2021

Status

approved