A221563 Triangular numbers representable as t*p, where t>1 is a triangular number, p>1 is a prime power (A025475).

120, 528, 1485, 3240, 58653, 70125, 139128, 609960, 886446, 902496, 1062153, 1844160, 4017195, 8386560, 8759205, 38618866, 39760903, 122062500, 160554240, 703893960, 741105750, 797222415, 6115239936, 10854464130, 23667373395, 82103447700, 131197213890

Offset

1,1

Links

Table of n, a(n) for n=1..27.

Example

Triangular(32) = 528 = 66 * 8, because 66 is a triangular number and 8 is a prime power, 528 is in the sequence.
Triangular(54) = 1485 = 55 * 27, because 55 is a triangular number and 27 is a prime power, 1485 is in the sequence.

Crossrefs

Cf. A000217, A025475, A029549.

Sequence in context: A157960 A067915 A305072 * A336626 A241613 A115619

Adjacent sequences: A221560 A221561 A221562 * A221564 A221565 A221566

Keyword

nonn

Author

Alex Ratushnyak, May 03 2013

Status

approved