A034702 a(n+1) is the smallest number not of the form a(i), a(i) + a(n-1), or |a(i) - a(n-1)|.

1, 2, 4, 7, 10, 5, 8, 11, 14, 17, 20, 23, 26, 13, 16, 19, 22, 25, 28, 31, 34, 37, 40, 43, 46, 49, 52, 55, 58, 29, 32, 35, 38, 41, 44, 47, 50, 53, 56, 59, 62, 65, 68, 71, 74, 77, 80, 83, 86, 89, 92, 95, 98, 101, 104, 107, 110, 113, 116, 119, 122, 61, 64, 67, 70, 73, 76, 79

Offset

1,2

Links

Table of n, a(n) for n=1..68.

C. Meyer, On conjecture 58 arising from the OEIS, 2004.

Formula

a(n) = 3n + 3 - 2*2^floor(log_2(n+2)), for n > 2.

Recurrence: a(n)=b(n+2), with b(0)=0, b(2n)=2b(n)+3, b(2n+1)=2b(n)+6-8[n==0].

Crossrefs

Sequence in context: A340989 A067785 A059186 * A325745 A167206 A053223

Adjacent sequences: A034699 A034700 A034701 * A034703 A034704 A034705

Keyword

nonn

Author

Erich Friedman

Status

approved