Least pentagonal number P(m) > P(n) such that P(m)+P(n) is again a pentagonal number, 0 if no such m exists.

A136114

Least pentagonal number P(m) > P(n) such that P(m)+P(n) is again a pentagonal number, 0 if no such m exists.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =70a(4) =0a(5) =0a(6) =782a(7) =0a(8) =0a(9) =3432a(10) =0a(11) =715a(12) =10045a(13) =3290a(14) =0a(15) =23375a(16) =1001a(17) =0a(18) =715a(19) =2035a(20) =7526a(21) =84847a(22) =0a(23) =0a(24) =1001a(25) =41251a(26) =0a(27) =4030a(28) =64170a(29) =32340

External references