A333009 Successive differences of A333008 (square roots of perfect squares that are the sum of two nonzero pentagonal numbers).

5, 3, 6, 5, 10, 4, 20, 17, 8, 1, 7, 2, 1, 1, 8, 1, 3, 8, 7, 2, 4, 4, 3, 11, 6, 4, 3, 9, 5, 7, 5, 3, 1, 2, 2, 1, 3, 2, 6, 1, 24, 1, 6, 1, 9, 8, 14, 4, 5, 4, 5, 5, 9, 2, 3, 2, 14, 3, 6, 8, 4, 2, 4, 10, 1, 2, 7, 1, 6, 8, 6, 7, 1, 8, 5, 7, 12, 8, 4, 4, 5, 2, 11, 4

Offset: 1

Author

Olivier Gérard, Mar 05 2020

Keywords

• nonn

Comments

The behavior of this sequence is unexpectedly quite complex.

Links

• Peter Kagey, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A332986 (analog for indices of triangular numbers).

Cf. A000326, A333007, A333008.