A009302 If a, b are in the sequence, so is ab+3.

2, 7, 17, 37, 52, 77, 107, 122, 157, 217, 247, 262, 292, 317, 367, 437, 497, 527, 542, 587, 632, 637, 737, 752, 857, 877, 887, 997, 1057, 1087, 1102, 1177, 1267, 1277, 1312, 1372, 1477, 1507, 1522, 1717, 1732, 1757, 1777, 1822, 1837, 1927, 1997, 2047, 2077, 2117

Offset

1,1

Links

Robert Israel, Table of n, a(n) for n = 1..10000

Maple

N:= 10000: # to get all terms <= N
S:= {2}:
Agenda:= {2};
while Agenda <> {} do
  x:= Agenda[1];
  T:= select(`<=`, map(s -> s*x+3, S) minus S, N);
  S:= S union T;
  Agenda:= Agenda[2..-1] union T;
od:
sort(convert(S, list)); # Robert Israel, Jun 08 2017

Crossrefs

Sequence in context: A023657 A045380 A086321 * A154117 A173769 A067038

Adjacent sequences: A009299 A009300 A009301 * A009303 A009304 A009305

Keyword

nonn

Author

David W. Wilson

Status

approved