A272911 Difference sequence of the sequence the increasing sequence of products of two Lucas numbers A000032.

2, 1, 3, 2, 2, 1, 4, 2, 3, 7, 1, 4, 11, 3, 2, 5, 18, 4, 1, 10, 29, 5, 2, 3, 15, 47, 10, 1, 4, 25, 76, 15, 3, 2, 5, 40, 123, 25, 4, 1, 10, 65, 199, 40, 5, 2, 3, 15, 105, 322, 65, 10, 1, 4, 25, 170, 521, 105, 15, 3, 2, 5, 40, 275, 843, 170, 25, 4, 1, 10, 65

Offset

1,1

Comments

Conjecture: every term is a product of two Lucas numbers or a product of two Fibonacci numbers.

Links

Clark Kimberling, Table of n, a(n) for n = 1..1000

Mathematica

z = 100; t = Take[Sort[Flatten[Table[LucasL[m] LucasL[n], {n, 1, z}, {m, n, z}]]],   1000]; Differences[t]

Crossrefs

Cf. A000032, A000045, A272909, A272912.

Sequence in context: A260088 A364969 A339399 * A371014 A284267 A296525

Adjacent sequences: A272908 A272909 A272910 * A272912 A272913 A272914

Keyword

nonn,easy

Author

Clark Kimberling, May 10 2016

Status

approved