A253287 Numbers representable as x^y + x*y and as b^c + b + c, where x, y, b, c are integers > 1.

8, 14, 3135, 10714, 70342709283

Offset

1,1

Comments

Intersection of A250004 and A253775.

No more terms < 10^20. - Lars Blomberg, Dec 13 2015

Links

Table of n, a(n) for n=1..5.

Example

a(2) = 14 = 2^3 + 2*3 = 3^2 + 2 + 3.
a(3) = 3135 = 55^2 + 55*2 = 5^5 + 5 + 5.
a(4) = 10714 = 22^3 + 22*3 = 103^2 + 103 + 2.
a(5) = 70342709283 = 265221^2 + 265221*2 = 4128^3 + 4128 + 3.

Crossrefs

Cf. A250004, A253775.

Sequence in context: A279708 A327875 A158967 * A357514 A331814 A082170

Adjacent sequences: A253284 A253285 A253286 * A253288 A253289 A253290

Keyword

nonn,more

Author

Alex Ratushnyak, Jan 18 2015

Status

approved