A055554 An arithmetic progression each term of which is followed by at least 4 nonsquarefree consecutive integers.

242, 1757711582, 3515422922, 5273134262, 7030845602, 8788556942, 10546268282, 12303979622, 14061690962, 15819402302, 17577113642, 19334824982, 21092536322, 22850247662, 24607959002, 26365670342

Offset: 1

Author

Labos Elemer, Jul 10 2000

Keywords

• nonn

Comments

From the terms of A051681 or A045882 similar progressions for longer chains can be constructed.

Links

• Tanya Khovanova, Recursive Sequences
• Index entries for linear recurrences with constant coefficients, signature (2, -1).

Crossrefs

Cf. A005117, A013929, A053806, A053797, A045882, A051681.

Formula

a(n) = d*n + 242, where d = LCM(242, 243, 244, 245) = 1757711340 = 2*2*3*3*3*3*3*5*7*11*11*61.