A077665 Final term of n-th row of A077664.

2, 5, 7, 11, 11, 23, 15, 23, 22, 33, 23, 47, 27, 45, 43, 47, 35, 71, 39, 69, 58, 69, 47, 95, 56, 81, 67, 93, 59, 139, 63, 95, 86, 105, 86, 143, 75, 117, 101, 139, 83, 187, 87, 139, 128, 141, 95, 191, 106, 173, 131, 163, 107, 215, 129, 185, 146, 177, 119, 283, 123, 189

Offset

1,1

Comments

a(p) = 2p+1, p is a prime. a(2^n) = 3*2^n -1.

a(n) also equals the (n+phi(n))th integer from among those positive integers coprime to n, where phi(n) = A000010(n). a(n) also equals n + (the n-th integer from among those positive integers coprime to n) = n + A069213(n). - Leroy Quet, Apr 12 2007

Links

Reinhard Zumkeller, Table of n, a(n) for n = 1..1000

Prog

(Haskell)
a077665 = last . a077664_row  -- Reinhard Zumkeller, Aug 03 2015

Crossrefs

Cf. A077664, A077666.

Sequence in context: A020484 A124203 A155085 * A025062 A360019 A175034

Adjacent sequences: A077662 A077663 A077664 * A077666 A077667 A077668

Keyword

nonn

Author

Amarnath Murthy, Nov 14 2002

Extensions

More terms from Sascha Kurz, Jan 03 2003

Status

approved