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A276704 Records in A249859. 1
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

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

LINKS

Table of n, a(n) for n=1..47.

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)

CROSSREFS

Cf. A249859, A276705.

Sequence in context: A168156 A295403 A272440 * A103022 A086189 A137082

Adjacent sequences:  A276701 A276702 A276703 * A276705 A276706 A276707

KEYWORD

nonn

AUTHOR

Colin Barker, Sep 15 2016

STATUS

approved

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Last modified October 21 22:47 EDT 2019. Contains 328315 sequences. (Running on oeis4.)