OFFSET
1,2
COMMENTS
a(5) = 7 = (-1, 0, 0, 0, 1) dot (0, 2, 3, 5, 7).
a(p(n)) = p(n-1) since prime rows of the Mobius transform have only one nonzero multiplier besides the (-1) which is multiplied * the 0 in (0, 2, 3, 5, 7,...). Cf. A055003: (1, 3, 7, 13, 29, 37,...) a subset of primes in the sequences, but other terms may be primes.
FORMULA
Mobius transform of the primes prefaced by 0.
EXAMPLE
a(6) = 6 = (1, -1, -1, 0, 0, 1) dot (0, 2, 3, 5, 7, 11) where (1, -1, -1, 0, 0, 1) = row 6 of A051731, the Mobius transform.
CROSSREFS
KEYWORD
nonn
AUTHOR
Gary W. Adamson, Aug 15 2008
EXTENSIONS
a(12) replaced by 17 and extended by R. J. Mathar, Jan 19 2009
STATUS
approved