A172233 Positive numbers of form 2^m - 2^l - 3*2^k, m>l>k>=0.

0, 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 16, 18, 20, 21, 22, 24, 25, 26, 27, 29, 32, 36, 40, 42, 44, 45, 48, 50, 52, 53, 54, 57, 58, 59, 61, 64, 72, 80, 84, 88, 90, 93, 96, 100, 104, 106, 108, 109, 114, 116, 117, 118, 121, 122, 123, 125, 128, 144, 160

Offset

1,3

Links

Table of n, a(n) for n=1..62.

Example

2^7 - 2^5 - 3*2^2 = 128-32-12 = 84, so 84 is in sequence.

Prog

(PARI) v=vector(10000); k=1; for(v2=2, 50, for(v1=1, v2-1, for(v0=0, v1-1, t=2^v2-3*2^v0-2^v1; v[k++]=t))); vecsort(v)

Crossrefs

Cf. A023758.

Sequence in context: A023749 A022556 A250482 * A189891 A032798 A195122

Adjacent sequences: A172230 A172231 A172232 * A172234 A172235 A172236

Keyword

nonn

Author

Ralf Stephan, Nov 20 2010

Status

approved