A308731 - cp's OEIS frontend

A308731 a(n) is the sum of the terms of the symmetric square array defined by M(i,j) = prime(i)+i-j for i >= j and M(i,j) = M(j,i) if i < j.

n	a(n)
1	2
2	13
3	44
4	105
5	224
6	397
7	660
8	1001
9	1464
10	2105
11	2866
12	3849
13	5030
14	6373
15	7946
16	9829
17	12048
18	14489
19	17310
20	20459
21	23872
22	27731
23	31972
24	36707
25	42060
26	47861
27	54022
28	60663
29	67688
30	75225
31	83902
32	93147
33	103108
34	113543
35	125014
36	136995
37	149788
38	163419
39	177760
40	192987
41	209126
42	225871
43	243912
44	262595
45	282108

[2, 13, 44, 105, 224, 397, 660, 1001, 1464, 2105, 2866, 3849, 5030, 6373, 7946, 9829, 12048, 14489, 17310, 20459, 23872, 27731, 31972, 36707, 42060, 47861, 54022, 60663, 67688, 75225, 83902, 93147, 103108, 113543, 125014, 136995, 149788, 163419, 177760, 192987, 209126, 225871, 243912, 262595, 282108]

cp's OEIS Frontend

A308731 a(n) is the sum of the terms of the symmetric square array defined by M(i,j) = prime(i)+i-j for i >= j and M(i,j) = M(j,i) if i < j.

Table of values

List of values