A000413 - cp's OEIS frontend

A000413 Let A(n) = #{(i,j,k): i^2 + j^2 + k^2 <= n}, V(n) = (4/3)Pin^(3/2), P(n) = A(n) - V(n); A000092 gives values of n where |P(n)| sets a new record; sequence gives A(A000092(n)).

n	a(n)
0	1
1	7
2	19
3	57
4	81
5	251
6	437
7	691
8	739
9	1743
10	3695
11	6619
12	8217
13	9771
14	14771
15	15155
16	16831
17	18805
18	26745
19	30551
20	41755
21	46297
22	54339
23	72359
24	86407
25	96969
26	131059
27	344859
28	395231
29	519963
30	607141
31	677397
32	741509
33	893019
34	917217
35	1288415
36	1406811
37	1789599
38	1827927
39	3085785
40	3216051
41	3444439
42	3524869

[1, 7, 19, 57, 81, 251, 437, 691, 739, 1743, 3695, 6619, 8217, 9771, 14771, 15155, 16831, 18805, 26745, 30551, 41755, 46297, 54339, 72359, 86407, 96969, 131059, 344859, 395231, 519963, 607141, 677397, 741509, 893019, 917217, 1288415, 1406811, 1789599, 1827927, 3085785, 3216051, 3444439, 3524869]

cp's OEIS Frontend

A000413 Let A(n) = #{(i,j,k): i^2 + j^2 + k^2 <= n}, V(n) = (4/3)Pin^(3/2), P(n) = A(n) - V(n); A000092 gives values of n where |P(n)| sets a new record; sequence gives A(A000092(n)).

Table of values

List of values

cp's OEIS Frontend

A000413 Let A(n) = #{(i,j,k): i^2 + j^2 + k^2 <= n}, V(n) = (4/3)*Pi*n^(3/2), P(n) = A(n) - V(n); A000092 gives values of n where |P(n)| sets a new record; sequence gives A(A000092(n)).

Table of values

List of values

A000413 Let A(n) = #{(i,j,k): i^2 + j^2 + k^2 <= n}, V(n) = (4/3)Pin^(3/2), P(n) = A(n) - V(n); A000092 gives values of n where |P(n)| sets a new record; sequence gives A(A000092(n)).