A276704 Records in A249859.

3, 5, 6, 21, 45, 77, 117, 165, 221, 285, 357, 437, 525, 621, 725, 837, 957, 1085, 1221, 1365, 1517, 1677, 1845, 2021, 2205, 2397, 2597, 2805, 3021, 3245, 3477, 3717, 3965, 4221, 4485, 4757, 5037, 5325, 5621, 5925, 6237, 6557, 6885, 7221, 7565, 7917, 8277

Offset: 1

Author

Colin Barker, Sep 15 2016

Keywords

• nonn

Comments

The indices of the records seem to be 4 and the odd integers.

Crossrefs

Cf. A249859, A276705.

Formula

Conjectures: (Start)

a(n) = 4*n^2-12*n+5 for n>3.

a(n) = 3*a(n-1)-3*a(n-2)+a(n-3) for n>6.

G.f.: x*(3-4*x+15*x^3-5*x^4-x^5) / (1-x)^3.

(End)