A175967 Lexicographically earliest sequence with first differences as increasing sequence of nonprimes A018252.

1, 2, 6, 12, 20, 29, 39, 51, 65, 80, 96, 114, 134, 155, 177, 201, 226, 252, 279, 307, 337, 369, 402, 436, 471, 507, 545, 584, 624, 666, 710, 755, 801, 849, 898, 948, 999, 1051, 1105, 1160, 1216, 1273, 1331, 1391, 1453, 1516, 1580, 1645, 1711, 1779

Offset: 1

Author

Jaroslav Krizek, Oct 31 2010

Keywords

• nonn

Comments

Complement of A175968.

Links

• Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A175965, A175966, A175968, A014284, A175969, A051349, A175970.

Cf. A018252.

Programs

Haskell

a175967 n = a175967_list !! n
a175967_list = scanl (+) 1 a018252_list
-- Reinhard Zumkeller, Mar 26 2015

Formula

a(n) - a(n-1) = A018252(n-1) for n >= 2.