A307645 Numbers that are the sum of a positive triangular number and a positive cube.

2, 4, 7, 9, 11, 14, 16, 18, 22, 23, 28, 29, 30, 33, 36, 37, 42, 44, 46, 48, 53, 55, 56, 63, 65, 67, 70, 72, 74, 79, 82, 85, 86, 92, 93, 99, 100, 105, 106, 109, 113, 118, 119, 121, 126, 128, 130, 131, 132, 135, 137, 140, 142, 144, 146, 147, 153, 154, 155, 161, 163, 169, 170, 172, 179

Offset: 1

Author

Ilya Gutkovskiy, Apr 19 2019

Keywords

• nonn

Crossrefs

Cf. A000217, A000578, A014133, A014155, A133254.

Formula

Exponents in expansion of (Sum_{i>=1} x^(i*(i+1)/2)) * (Sum_{j>=1} x^(j^3)).