A374142 - cp's OEIS frontend

A374142 a(n) is the smallest number which can be represented as the sum of two distinct nonzero heptagonal numbers in exactly n ways, or -1 if no such number exists.

n	a(n)
1	8
2	617
3	8726
4	255575
5	1339801
6	2419165
7	9402323
8	25764500
9	35486953
10	144568133
11	385495261
12	735503569
13	638279039
14	1183071664
15	1571634527
16	4449717748
17	3584182298
18	3871587494
19	5693954599
20	27084640649
21	24205505111
22	32489035067
23	31973745058
24	38935021406
25	47570693867
26	44749048300
27	53075499329

[8, 617, 8726, 255575, 1339801, 2419165, 9402323, 25764500, 35486953, 144568133, 385495261, 735503569, 638279039, 1183071664, 1571634527, 4449717748, 3584182298, 3871587494, 5693954599, 27084640649, 24205505111, 32489035067, 31973745058, 38935021406, 47570693867, 44749048300, 53075499329]

cp's OEIS Frontend

A374142 a(n) is the smallest number which can be represented as the sum of two distinct nonzero heptagonal numbers in exactly n ways, or -1 if no such number exists.

Table of values

List of values