A113938 Numbers which are powerful(1) (A001694) and triangular at the same time.

1, 36, 1225, 29403, 41616, 1413721, 48024900, 74024028, 1631432881, 27665282700, 55420693056, 1024060098375, 1665678432600, 1882672131025, 63955431761796, 194838725161125, 2172602007770041, 26030209161894003, 73804512832419600

Offset

1,2

Links

Donovan Johnson, Table of n, a(n) for n = 1..47 (terms < 10^37)

Example

29403=T(242) and 29403=3^5*11^2.

Crossrefs

Cf. A001694, A000217.

Sequence in context: A103278 A004294 A075760 * A001110 A331234 A278806

Adjacent sequences: A113935 A113936 A113937 * A113939 A113940 A113941

Keyword

nonn

Author

Giovanni Resta, Jan 31 2006

Extensions

a(12)-a(19) from Donovan Johnson, Dec 07 2008

Status

approved