A225524 - cp's OEIS frontend

A225524 G.f.: exp( Sum_{n>=1} (sigma(2n) - sigma(n))Lucas(n)*x^n/n ), where Lucas(n) = A000204(n) and sigma(n) = A000203(n) is the sum of divisors of n.

n	a(n)
0	1
1	2
2	8
3	24
4	66
5	184
6	488
7	1248
8	3136
9	7776
10	18780
11	44880
12	105896
13	246124
14	567008
15	1293840
16	2920626
17	6545352
18	14555388
19	32115120
20	70421792
21	153451488
22	332314512
23	715843200
24	1534016392
25	3270661294
26	6941489040
27	14667591672
28	30859685088
29	64670865304
30	135011595856
31	280813639680

[1, 2, 8, 24, 66, 184, 488, 1248, 3136, 7776, 18780, 44880, 105896, 246124, 567008, 1293840, 2920626, 6545352, 14555388, 32115120, 70421792, 153451488, 332314512, 715843200, 1534016392, 3270661294, 6941489040, 14667591672, 30859685088, 64670865304, 135011595856, 280813639680]

cp's OEIS Frontend

A225524 G.f.: exp( Sum_{n>=1} (sigma(2n) - sigma(n))Lucas(n)*x^n/n ), where Lucas(n) = A000204(n) and sigma(n) = A000203(n) is the sum of divisors of n.

Table of values

List of values

cp's OEIS Frontend

A225524 G.f.: exp( Sum_{n>=1} (sigma(2*n) - sigma(n))*Lucas(n)*x^n/n ), where Lucas(n) = A000204(n) and sigma(n) = A000203(n) is the sum of divisors of n.

Table of values

List of values

A225524 G.f.: exp( Sum_{n>=1} (sigma(2n) - sigma(n))Lucas(n)*x^n/n ), where Lucas(n) = A000204(n) and sigma(n) = A000203(n) is the sum of divisors of n.